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Sep 16 at 2:59 comment added Zach Teitler It appears that the mistake in OEIS has been corrected. It now says "Table of n, a(n) for n=2..10."
Jun 1, 2019 at 17:11 history edited Abdelmalek Abdesselam CC BY-SA 4.0
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Nov 26, 2017 at 20:26 vote accept Colin McLarty
Nov 26, 2017 at 19:20 comment added Abdelmalek Abdesselam @Colin: It's just a mistake in OEIS. If by definition $a(n)$ is the number of generating invariants for binary forms of degree $n$, then by looking at oeis.org/A036983/list , namely, the list format, then you can see that they are off by one in their indexing. The linear form has no invariants. The binary quadratic and cubic only have one invariant.
Nov 25, 2017 at 14:57 comment added Colin McLarty @MartinRubey That makes sense but I do not understand what they mean when they link to "Table of n, a(n) for n=2..11."
Nov 25, 2017 at 14:30 comment added Martin Rubey I don't think so, the last entry is 106.
Nov 25, 2017 at 14:15 comment added Colin McLarty @MartinRubey the series A036983 seems to go beyond this answer by including ${\rm Inv}_{11}$. Have I understood that correctly?
Nov 24, 2017 at 20:32 comment added Martin Rubey slightly outdated: oeis.org/A036984 and oeis.org/A036983.
Nov 24, 2017 at 20:16 history edited Abdelmalek Abdesselam CC BY-SA 3.0
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Nov 24, 2017 at 19:37 history answered Abdelmalek Abdesselam CC BY-SA 3.0