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 A261979 #6 Sep 07 2015 09:00:24 %S A261979 1,4,0,-16,16,120,-128,-928,1056,7572,-8960,-63408,77248,540504, %T A261979 -672000,-4665824,5888832,40656072,-51913728,-356835664,459890400, %U A261979 3150052992,-4090609024,-27939033312,36509767552,248772971228,-326815190784,-2222432164768,2932886151552,19910399315736 %N A261979 Expansion of (elliptic_K / elliptic_E)^(1/2) in powers of q. %F A261979 See A261976 for the g.f. for K/E. %Y A261979 Cf. A261975 (E/K), A261977 ((E/K)^(1/2)), A261978 ((E/K)^(1/4)). %Y A261979 Cf. A261976 (K/E), A261980 ((K/E)^(1/4)). %Y A261979 Cf. A004018 (elliptic K(q)), A194094 (elliptic E(q)), A115977 (elliptic k(q)^2). %K A261979 sign %O A261979 0,2 %A A261979 _Joerg Arndt_, Sep 07 2015