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 A274345 #15 Aug 08 2025 01:54:56
%S A274345 1,13,184,2701,40456,306860,9391936,144644749,2238445480,17386135604,
%T A274345 541801226176,2115779182678,132472258939840,1038616414507808,
%U A274345 32621327116946944,512963507737401997,8075477240446327528,63629398756188443588,2007225253307641799872,7921211894405933627674,500517296244244008379456
%N A274345 Numerators of coefficients in the expansion of (log(q) - log(k^2/16))/(8*k^2/16) in powers of k^2/16, where q is the Jacobi nome and k^2 the parameter of elliptic functions.
%C A274345 For the denominators see A274346.
%C A274345 The rationals r(n) = a(n)/A274346(n) are given by A227503(n+1)/(n+1) reduced to lowest terms. See A227503 for details, references and links.
%F A274345 a(n) = numerator(A227503(n+1)/(n+1)), n >= 0.
%F A274345 (log(q) - log(k^2/16))/(8*k^2/16) = Sum_{n >= 0} (a(n)/A274346(n))*(k^2/16)^n.
%e A274345 The first rationals r(n) = a(n)/A274346(n) are: 1/1, 13/2, 184/3, 2701/4, 40456/5, 306860/3, 9391936/7, 144644749/8, 2238445480/9, 17386135604/5, 541801226176/11, 2115779182678/3, 132472258939840/13, 1038616414507808/7, 32621327116946944/15, ...
%t A274345 (* See the program for r(n-1), n >= 1, in A274346. *)
%Y A274345 Cf. A227503, A274346.
%K A274345 nonn,frac,easy
%O A274345 0,2
%A A274345 _Wolfdieter Lang_, Jun 30 2016