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 A309060 #59 Jul 02 2024 02:10:56
%S A309060 1,3,17,627,14637
%N A309060 Least k such that the rank of the elliptic curve y^2 = x^3 + k^2*x is n.
%C A309060 From _Jose Aranda_, Jun 30 2024: (Start)
%C A309060 A319510(n even) = A309061(n/2), A319510(n odd) = A309061(2*n) (Empirical).
%C A309060 A194687(5) = 48272239 which implies a(5) <= 96544478 (Checked).
%C A309060 A194687(6) = 6611719866 which implies a(6) <= 3305859933 (Checked).
%C A309060 A194687(7) <= 797507543735 which implies a(7) <= 1595015087470 (Checked). (End)
%F A309060 A309061(a(n)) = n.
%e A309060 A309061(1) = 0.
%e A309060 A309061(3) = 1.
%e A309060 A309061(17) = 2.
%o A309060 (PARI) {a(n) = my(k=1); while(ellanalyticrank(ellinit([0, 0, 0, k^2, 0]))[1]<>n, k++); k}
%Y A309060 Cf. A194687, A309028, A309061, A319510.
%K A309060 nonn,more,hard
%O A309060 0,2
%A A309060 _Seiichi Manyama_, Jul 09 2019