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 A261980 #6 Sep 07 2015 09:00:29 %S A261980 1,2,-2,-4,14,24,-92,-176,694,1342,-5480,-10612,44532,86408,-369328, %T A261980 -717616,3109078,6046724,-26473950,-51523620,227477656,442950880, %U A261980 -1969014572,-3835720208,17147433572,33415180858,-150096433272,-292574352808,1319581377424,2572787175656,-11644937717296 %N A261980 Expansion of (elliptic_K / elliptic_E)^(1/4) in powers of q. %F A261980 See A261976 for the g.f. for K/E. %Y A261980 Cf. A261975 (E/K), A261977 ((E/K)^(1/2)), A261978 ((E/K)^(1/4)). %Y A261980 Cf. A261976 (K/E), A261979 ((K/E)^(1/2)). %Y A261980 Cf. A004018 (elliptic K(q)), A194094 (elliptic E(q)), A115977 (elliptic k(q)^2). %K A261980 sign %O A261980 0,2 %A A261980 _Joerg Arndt_, Sep 07 2015