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 A036725 #5 Jul 08 2025 21:55:20 %S A036725 1,1,4,32,268,2574,26004,274752,2990412,33321801,378155340,4355839608, %T A036725 50792907100,598432565856,7112882558060,85186232560504, %U A036725 1026982086302284,12453151958594288,151785836438975264,1858565360218893144,22851521570687098564 %N A036725 G.f. satisfies A(x) = 1 + x*cycle_index(G,A(x)) where G = cyclic group of order 2 generated by (1,2)(3,4)(5,6)(7,8). %Y A036725 Cf. A036717-A036724. %K A036725 nonn %O A036725 0,3 %A A036725 _N. J. A. Sloane_