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 A385059 #8 Jun 16 2025 08:42:19 %S A385059 1,1,7,40,397,2336,-46601,-2661896,-125428775,-3724273664, %T A385059 -90080842229,1096530753176,400257318802213,36023363702572000, %U A385059 2951479723885410943,178834401869241704056,8444450128124255913649,-59239960097902788177664,-92000068200778017857238125 %N A385059 E.g.f. A(x) satisfies A(x) = exp(x*A(x)/A(-x*A(x))^2). %F A385059 See A385062. %o A385059 (PARI) a(n, k=-1) = if(n*k==0, 0^n, (-1)^n*k*sum(j=1, n, (-n+k)^(j-1)*binomial(n, j)*a(n-j, 2*j))); %Y A385059 Column k=1 of A385062. %Y A385059 Cf. A052752, A384983. %K A385059 sign %O A385059 0,3 %A A385059 _Seiichi Manyama_, Jun 16 2025