This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A309964 #22 Jan 25 2023 00:26:31 %S A309964 21691,27937,33193,34706,36667,39331,45353,46299,53265,55298,55335, %T A309964 59295,59690,62628,63147,64001,65683,73963,78604,82290,87653,90489, %U A309964 94681,96139 %N A309964 Numbers k for which rank of the elliptic curve y^2 = x^3 - 432*k^2 is 4. %F A309964 A060838(a(n)) = 4. %o A309964 (PARI) for(k=1, 5e4, if(ellanalyticrank(ellinit([0, 0, 0, 0, -432*k^2]))[1]==4, print1(k", "))) %Y A309964 Subsequence of A159843. %Y A309964 Cf. A060748, A060838, A309960 (rank 0), A309961 (rank 1), A309962 (rank 2), A309963 (rank 3). %K A309964 nonn %O A309964 1,1 %A A309964 _Seiichi Manyama_, Aug 25 2019 %E A309964 a(18)-a(24) from Maksym Voznyy, Jan 25 2023