**This is a partial answer.**\
Using the group law of elliptic curves, we have 

$b_{10}=\frac{\left(n^{102}+133370 n^{100}+235431945 n^{98}-53960558412 n^{96}+37353015835420 n^{94}+1715285459850920 n^{92}+154018873425409932 n^{90}+4528460790052228992 n^{88}-10283455511101671494 n^{86}+424389497721502142548 n^{84}+21198683938074571284634 n^{82}+261033154046082383403576 n^{80}+2270064982003402818480028 n^{78}+15317757618354379225002184 n^{76}+84218098664615395090065004 n^{74}+345159573021345914583822624 n^{72}+1129951624304798874757797847 n^{70}+3131305476125014022272232326 n^{68}+7635830330877839055871498111 n^{66}+16446578072159313295259200380 n^{64}+31726949494863946397847804664 n^{62}+54769575000613973884608095824 n^{60}+84669779180983943334398860888 n^{58}+117776609406232459328970393984 n^{56}+146631440164415842271230869964 n^{54}+164805637943248865339648114968 n^{52}+165741869909257891183520432332 n^{50}+150306415334481456543373768912 n^{48}+121703129810992794049207385688 n^{46}+88124674373459097943143748048 n^{44}+56481814917222827023209545464 n^{42}+31767118902941960531617938880 n^{40}+15407922021660173371718373183 n^{38}+6306682290739982829447936934 n^{36}+2063724483753154237664688919 n^{34}+509509860910406920886925292 n^{32}+72423661674195782496620652 n^{30}-2085965471015373600109304 n^{28}-3102450405774431050519652 n^{26}-511897235486864832178688 n^{24}+72673456634449307534874 n^{22}+33312001105932688908244 n^{20}+3846262561102571988538 n^{18}+294258428803841831032 n^{16}+9380206793092459404 n^{14}+156074955019903848 n^{12}-7836007732260580 n^{10}-12400565501408 n^{8}+607383986505 n^{6}+2125016730 n^{4}-948799 n^{2}+100\right) n}{100 n^{102}-948799 n^{100}+2125016730 n^{98}+607383986505 n^{96}-12400565501408 n^{94}-7836007732260580 n^{92}+156074955019903848 n^{90}+9380206793092459404 n^{88}+294258428803841831032 n^{86}+3846262561102571988538 n^{84}+33312001105932688908244 n^{82}+72673456634449307534874 n^{80}-511897235486864832178688 n^{78}-3102450405774431050519652 n^{76}-2085965471015373600109304 n^{74}+72423661674195782496620652 n^{72}+509509860910406920886925292 n^{70}+2063724483753154237664688919 n^{68}+6306682290739982829447936934 n^{66}+15407922021660173371718373183 n^{64}+31767118902941960531617938880 n^{62}+56481814917222827023209545464 n^{60}+88124674373459097943143748048 n^{58}+121703129810992794049207385688 n^{56}+150306415334481456543373768912 n^{54}+165741869909257891183520432332 n^{52}+164805637943248865339648114968 n^{50}+146631440164415842271230869964 n^{48}+117776609406232459328970393984 n^{46}+84669779180983943334398860888 n^{44}+54769575000613973884608095824 n^{42}+31726949494863946397847804664 n^{40}+16446578072159313295259200380 n^{38}+7635830330877839055871498111 n^{36}+3131305476125014022272232326 n^{34}+1129951624304798874757797847 n^{32}+345159573021345914583822624 n^{30}+84218098664615395090065004 n^{28}+15317757618354379225002184 n^{26}+2270064982003402818480028 n^{24}+261033154046082383403576 n^{22}+21198683938074571284634 n^{20}+424389497721502142548 n^{18}-10283455511101671494 n^{16}+4528460790052228992 n^{14}+154018873425409932 n^{12}+1715285459850920 n^{10}+37353015835420 n^{8}-53960558412 n^{6}+235431945 n^{4}+133370 n^{2}+1}
$
$b_{11}=\frac{\left(n^{120}+236252 n^{118}+734363634 n^{116}-312770699492 n^{114}+372591844872939 n^{112}+24846206675655560 n^{110}+4397460814156889380 n^{108}+197098278557698691880 n^{106}-3344010959849032904451 n^{104}+77041054916969931469604 n^{102}+6025814782162621289529574 n^{100}+103995465476911844397376836 n^{98}+1403483097587777368439021975 n^{96}+15498012900538452440256329232 n^{94}+142925176113346096459752929320 n^{92}+898285418497461503114875588304 n^{90}+4154689922196564345724488430173 n^{88}+16274187858368913956279733198300 n^{86}+61890000902737222242418970136450 n^{84}+225779196578375145753832632507996 n^{82}+756786678765469678606166591535567 n^{80}+2262534612561363902593953210725304 n^{78}+5917547652470211201971343014836380 n^{76}+13620277856356468776332219700867480 n^{74}+27459152125492247279736040270198329 n^{72}+49018178073029219641783948590200964 n^{70}+77697769677873785728455499712552550 n^{68}+110108815699791321232665610983560548 n^{66}+140147096559211503009874312621611515 n^{64}+160704499865273317527676592295669216 n^{62}+166800079319744449016824823686303024 n^{60}+156803394222544054034958059457136224 n^{58}+134108869765624608642875089743841427 n^{56}+104330906826393397189405252036072564 n^{54}+74132059482284441103456770631089478 n^{52}+48085116554380394968670681241369780 n^{50}+28566416464099272660681894365198097 n^{48}+15472531151366340592453782011285112 n^{46}+7634070524957506190629044185948700 n^{44}+3376267460065621992265053228120024 n^{42}+1319335874981699856700548139386471 n^{40}+442263567882306852924119639251404 n^{38}+122783505051121829165127645781602 n^{36}+27107460947533293092765040330156 n^{34}+4525830480756840714555835855797 n^{32}+455893058739248616779979806480 n^{30}+4694990023388238740422470184 n^{28}-6744049455656087942958073392 n^{26}-1138735253459131761691971889 n^{24}-36517193907554294094976812 n^{22}+6530567094465986775850822 n^{20}+533216700911799507392468 n^{18}+28783653421923421178997 n^{16}+559607160876545566536 n^{14}+7749092040428976292 n^{12}-163753085727869848 n^{10}-208299265226589 n^{8}+3950879704204 n^{6}+8107202130 n^{4}-2036308 n^{2}+121\right) n}{121 n^{120}-2036308 n^{118}+8107202130 n^{116}+3950879704204 n^{114}-208299265226589 n^{112}-163753085727869848 n^{110}+7749092040428976292 n^{108}+559607160876545566536 n^{106}+28783653421923421178997 n^{104}+533216700911799507392468 n^{102}+6530567094465986775850822 n^{100}-36517193907554294094976812 n^{98}-1138735253459131761691971889 n^{96}-6744049455656087942958073392 n^{94}+4694990023388238740422470184 n^{92}+455893058739248616779979806480 n^{90}+4525830480756840714555835855797 n^{88}+27107460947533293092765040330156 n^{86}+122783505051121829165127645781602 n^{84}+442263567882306852924119639251404 n^{82}+1319335874981699856700548139386471 n^{80}+3376267460065621992265053228120024 n^{78}+7634070524957506190629044185948700 n^{76}+15472531151366340592453782011285112 n^{74}+28566416464099272660681894365198097 n^{72}+48085116554380394968670681241369780 n^{70}+74132059482284441103456770631089478 n^{68}+104330906826393397189405252036072564 n^{66}+134108869765624608642875089743841427 n^{64}+156803394222544054034958059457136224 n^{62}+166800079319744449016824823686303024 n^{60}+160704499865273317527676592295669216 n^{58}+140147096559211503009874312621611515 n^{56}+110108815699791321232665610983560548 n^{54}+77697769677873785728455499712552550 n^{52}+49018178073029219641783948590200964 n^{50}+27459152125492247279736040270198329 n^{48}+13620277856356468776332219700867480 n^{46}+5917547652470211201971343014836380 n^{44}+2262534612561363902593953210725304 n^{42}+756786678765469678606166591535567 n^{40}+225779196578375145753832632507996 n^{38}+61890000902737222242418970136450 n^{36}+16274187858368913956279733198300 n^{34}+4154689922196564345724488430173 n^{32}+898285418497461503114875588304 n^{30}+142925176113346096459752929320 n^{28}+15498012900538452440256329232 n^{26}+1403483097587777368439021975 n^{24}+103995465476911844397376836 n^{22}+6025814782162621289529574 n^{20}+77041054916969931469604 n^{18}-3344010959849032904451 n^{16}+197098278557698691880 n^{14}+4397460814156889380 n^{12}+24846206675655560 n^{10}+372591844872939 n^{8}-312770699492 n^{6}+734363634 n^{4}+236252 n^{2}+1}$

All other $b_{m}$ can also be generated. Given,

$$(a^3-b)(b^3-a) = y^2$$

**First family ($a=n$)**

Denote $$E_1=\{(U,V): V^2 = -U^4+n^3U^3+nU-n^4\}\cup O.$$
It is birationally equivalent to Weierstrass form
$$E_2=\{(X,Y): Y^{2}+\left(3 n^{2}-1\right)XY + \left(2 n^{6}-10 n^{4}+8 n^{2}\right)Y
 = 
X^{3}+\left(\frac{3}{4} n^{4}-\frac{9}{2} n^{2}-\frac{1}{4}\right) X^{2}+4 n^{2} \left(n -1\right)^{2} \left(n +1\right)^{2} X +3 n^{10}-24 n^{8}+38 n^{6}-16 n^{4}-n^{2}
\}\cup O.$$
Let
$P=\left(3 n^{2}+1, -2 n^{6}-\frac{1}{2} n^{4}-5 n^{2}-\frac{1}{2}\right)\in E_2,$
then the $U$ corresponding to $[m-1]P$ is exactly $b_m$ where $m\geq 1$.

**Second family ($a=n^3$)**

Denote $$E_3=\{(U,V):V^{2} = n^{9} U^{3}-n^{12}-U^{4}+n^{3} U\}\cup O.$$
It is birationally equivalent to 
$$E_4=\{(X,Y):Y^{2} = 
X^{3}+\left(3 n^{10}-6 n^{2}\right) X^{2}+\left(3 n^{20}-15 n^{12}+12 n^{4}\right) X -9 n^{22}+18 n^{14}-9 n^{6}
\}\cup O.$$
Let $Q=(n^{12}-n^{10}+n^{6}+2 n^{2}+1, n^{18}+n^{12}+n^{6}+1) \in E_4,$ then the $U$ corresponding to $[m]Q$ is exactly $b_m$ where $m\geq 1$.

For example
$b_4=\frac{n \left(n^{48}+32 n^{46}+552 n^{42}-1088 n^{40}-16 n^{38}+5820 n^{36}+8160 n^{34}+544 n^{32}+6552 n^{30}+18560 n^{28}-4080 n^{26}+23302 n^{24}+8160 n^{22}-9280 n^{20}+6552 n^{18}-1088 n^{16}-4080 n^{14}+5820 n^{12}+32 n^{10}+544 n^{8}+552 n^{6}-16 n^{2}+1\right)}{n^{48}-16 n^{46}+552 n^{42}+544 n^{40}+32 n^{38}+5820 n^{36}-4080 n^{34}-1088 n^{32}+6552 n^{30}-9280 n^{28}+8160 n^{26}+23302 n^{24}-4080 n^{22}+18560 n^{20}+6552 n^{18}+544 n^{16}+8160 n^{14}+5820 n^{12}-16 n^{10}-1088 n^{8}+552 n^{6}+32 n^{2}+1}
$
$b_5=\frac{n \left(n^{78}+49 n^{76}-50 n^{74}+2093 n^{72}-9092 n^{70}+7024 n^{68}+71486 n^{66}+146362 n^{64}-221372 n^{62}+120846 n^{60}+1989884 n^{58}-1997248 n^{56}+2411691 n^{54}+2513095 n^{52}-3945398 n^{50}+4925063 n^{48}+1374136 n^{46}-4812512 n^{44}+9246036 n^{42}+3689036 n^{40}-10556008 n^{38}+9246036 n^{36}+2487832 n^{34}-5926208 n^{32}+4925063 n^{30}+3430735 n^{28}-4863038 n^{26}+2411691 n^{24}+1056332 n^{22}-1063696 n^{20}+120846 n^{18}+102298 n^{16}-177308 n^{14}+71486 n^{12}-3476 n^{10}+1408 n^{8}+2093 n^{6}+25 n^{4}-26 n^{2}+1\right)}{n^{78}-26 n^{76}+25 n^{74}+2093 n^{72}+1408 n^{70}-3476 n^{68}+71486 n^{66}-177308 n^{64}+102298 n^{62}+120846 n^{60}-1063696 n^{58}+1056332 n^{56}+2411691 n^{54}-4863038 n^{52}+3430735 n^{50}+4925063 n^{48}-5926208 n^{46}+2487832 n^{44}+9246036 n^{42}-10556008 n^{40}+3689036 n^{38}+9246036 n^{36}-4812512 n^{34}+1374136 n^{32}+4925063 n^{30}-3945398 n^{28}+2513095 n^{26}+2411691 n^{24}-1997248 n^{22}+1989884 n^{20}+120846 n^{18}-221372 n^{16}+146362 n^{14}+71486 n^{12}+7024 n^{10}-9092 n^{8}+2093 n^{6}-50 n^{4}+49 n^{2}+1}
$
$b_6=\frac{n \left(n^{108}+72 n^{106}+6234 n^{102}-31104 n^{100}-36 n^{98}+569433 n^{96}+3063744 n^{94}+15552 n^{92}-1574800 n^{90}+64105344 n^{88}-1531872 n^{86}+165039924 n^{84}+242797536 n^{82}-32052672 n^{80}+963577944 n^{78}-594241920 n^{76}-121398768 n^{74}+4018389060 n^{72}+20450880 n^{70}+297120960 n^{68}+8815738128 n^{66}-329795712 n^{64}-10225440 n^{62}+12135907374 n^{60}+1187302320 n^{58}+164897856 n^{56}+16524170140 n^{54}-329795712 n^{52}-593651160 n^{50}+12135907374 n^{48}+20450880 n^{46}+164897856 n^{44}+8815738128 n^{42}-594241920 n^{40}-10225440 n^{38}+4018389060 n^{36}+242797536 n^{34}+297120960 n^{32}+963577944 n^{30}+64105344 n^{28}-121398768 n^{26}+165039924 n^{24}+3063744 n^{22}-32052672 n^{20}-1574800 n^{18}-31104 n^{16}-1531872 n^{14}+569433 n^{12}+72 n^{10}+15552 n^{8}+6234 n^{6}-36 n^{2}+1\right)}{n^{108}-36 n^{106}+6234 n^{102}+15552 n^{100}+72 n^{98}+569433 n^{96}-1531872 n^{94}-31104 n^{92}-1574800 n^{90}-32052672 n^{88}+3063744 n^{86}+165039924 n^{84}-121398768 n^{82}+64105344 n^{80}+963577944 n^{78}+297120960 n^{76}+242797536 n^{74}+4018389060 n^{72}-10225440 n^{70}-594241920 n^{68}+8815738128 n^{66}+164897856 n^{64}+20450880 n^{62}+12135907374 n^{60}-593651160 n^{58}-329795712 n^{56}+16524170140 n^{54}+164897856 n^{52}+1187302320 n^{50}+12135907374 n^{48}-10225440 n^{46}-329795712 n^{44}+8815738128 n^{42}+297120960 n^{40}+20450880 n^{38}+4018389060 n^{36}-121398768 n^{34}-594241920 n^{32}+963577944 n^{30}-32052672 n^{28}+242797536 n^{26}+165039924 n^{24}-1531872 n^{22}+64105344 n^{20}-1574800 n^{18}+15552 n^{16}+3063744 n^{14}+569433 n^{12}-36 n^{10}-31104 n^{8}+6234 n^{6}+72 n^{2}+1}
$
and so on.