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 A384575 #12 Jun 04 2025 09:53:13 %S A384575 1,1,1,6,31,236,2166,22722,269889,3567412,51765431,816476196, %T A384575 13892821878,253442895075,4930644856063,101830536332051, %U A384575 2223767436058566,51172807259226084,1237092039069090235,31332521053777095784,829389782837272248191,22894754438382163120136 %N A384575 G.f. A(x) satisfies A(x) = 1 + x * A(x*A(x)^5). %F A384575 See A384583. %o A384575 (PARI) a(n, k=1) = if(k==0, 0^n, k*sum(j=0, n, binomial(5*n-5*j+k, j)/(5*n-5*j+k)*a(n-j, j))); %Y A384575 Column k=1 of A384583. %Y A384575 Cf. A087949, A143500, A143501, A384574. %Y A384575 Cf. A384579. %K A384575 nonn %O A384575 0,4 %A A384575 _Seiichi Manyama_, Jun 04 2025