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 A036730 #5 Jul 08 2025 21:55:54 %S A036730 1,1,1,7,41,252,1675,11634,83181,608818,4539896,34364253,263355143, %T A036730 2039370396,15933107322,125436559380,994121046225,7924935634275, %U A036730 63504334502998,511233121598277,4132727837100768,33533674854227400 %N A036730 G.f. satisfies A(x) = 1 + x*cycle_index(G,A(x)) where G = cyclic group of order 13 generated by (1,2,...,13). %Y A036730 Cf. A036717-A036726. %K A036730 nonn %O A036730 0,4 %A A036730 _N. J. A. Sloane_