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 A385551 #9 Jul 03 2025 09:30:19
%S A385551 1,1,0,-1,-1,4,3,-147,-770,15721,107475,-10571326,-227719699,
%T A385551 23388067045,997369658304,-266390905549461,-23979310388230253,
%U A385551 11854227262950292612,2477760824989752459951,-2291696206079126389222423,-973819883013544085453392378,1953283201528648806346685956669
%N A385551 G.f. A(x) satisfies A(x) = Sum_{k>=0} x^k * A(-k*x).
%F A385551 a(0) = 1; a(n) = Sum_{k=0..n-1} (k-n)^k * a(k).
%o A385551 (PARI) a_vector(n) = my(v=vector(n+1)); v[1]=1; for(i=1, n, v[i+1]=sum(j=0, i-1, (j-i)^j*v[j+1])); v;
%Y A385551 Cf. A125282, A195067.
%Y A385551 Cf. A385550.
%K A385551 sign,easy
%O A385551 0,6
%A A385551 _Seiichi Manyama_, Jul 03 2025