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Permutation using irreducible fractions

(R(x, y)==k), y++; if(x==y, x++; y=1, if(gcd(x,y)>1, y++; if(x==y, x++; y=1)))); print([x,y]); x=2; y=1); It appears that irreducible fractions corresponding to each natural number are A071585/A071766 …
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