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 A261976 #7 Sep 07 2015 09:00:36 %S A261976 1,8,16,-32,-96,368,960,-3392,-8896,31528,82656,-292704,-767616, %T A261976 2719024,7130496,-25257408,-66235776,234616720,615265872,-2179359392, %U A261976 -5715218752,20244124928,53088812352,-188048196544,-493143336192,1746784492472,4580821023328,-16225925666624 %N A261976 Expansion of elliptic_K / elliptic_E in powers of q. %F A261976 G.f.: T3^5 / (T4^4 * T3 + 4*q * d/dq T3) where T3 = theta_3(q) and T4 = theta_4(q). %Y A261976 Cf. A004018 (elliptic K(q)), A194094 (elliptic E(q)), A115977 (elliptic k(q)^2). %Y A261976 Cf. A261979 ((K/E)^(1/2)), A261980 ((K/E)^(1/4)). %Y A261976 Cf. A261975 (E/K), A261977 ((E/K)^(1/2)), A261978 ((E/K)^(1/4)). %K A261976 sign %O A261976 0,2 %A A261976 _Joerg Arndt_, Sep 07 2015