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 A385058 #7 Jun 16 2025 08:42:35 %S A385058 1,1,5,31,333,3841,57463,836109,11138921,14908465,-10091931669, %T A385058 -687827361011,-40151825312387,-2071761364164231,-106488772704576961, %U A385058 -5002145237145820979,-203989286928198178863,-4164191357488024315679,500440079223957671460307,99906607739361143393212941 %N A385058 E.g.f. A(x) satisfies A(x) = exp(x*A(x)/A(-x*A(x))). %F A385058 See A385061. %o A385058 (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, j))); %Y A385058 Column k=1 of A385061. %Y A385058 Cf. A052750, A384982. %K A385058 sign %O A385058 0,3 %A A385058 _Seiichi Manyama_, Jun 16 2025