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 A384650 #10 Jun 06 2025 08:35:53 %S A384650 1,1,2,10,69,592,6052,70870,928497,13404514,210892157,3584892350, %T A384650 65390514877,1272723903336,26307949481077,575201364472316, %U A384650 13255835789428863,320999903683710948,8145524458876305526,216062918679078474529,5977572987203090333399 %N A384650 G.f. A(x) satisfies A(x) = 1/( 1 - x*A(x*A(x)^5) ). %F A384650 See A384654. %o A384650 (PARI) a(n, k=1) = if(k==0, 0^n, k*sum(j=0, n, binomial(5*n-4*j+k, j)/(5*n-4*j+k)*a(n-j, j))); %Y A384650 Column k=1 of A384654. %Y A384650 Cf. A110447, A162661, A384145, A384649. %K A384650 nonn %O A384650 0,3 %A A384650 _Seiichi Manyama_, Jun 06 2025