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 A370799 #9 Mar 02 2024 10:39:22
%S A370799 1,2,4,7,7,-18,-152,-648,-2076,-5006,-6442,17866,178102,851516,
%T A370799 3004912,7956103,11925503,-24636636,-298702394,-1532903353,
%U A370799 -5722053149,-16080843014,-27090920172,37370086052,584086176148,3182365757908,12407797520932,36551266481968
%N A370799 Expansion of (1/x) * Series_Reversion( x/(x+1/(1-x+x^2)) ).
%H A370799 <a href="/index/Res#revert">Index entries for reversions of series</a>
%F A370799 a(n) = Sum_{k=0..n} binomial(n,k) * b(k), where g.f. B(x) = Sum_{k>=0} b(k)*x^k satisfies B(x) = (1/x) * Series_Reversion( x*(1-x+x^2) ).
%o A370799 (PARI) my(N=30, x='x+O('x^N)); Vec(serreverse(x/(x+1/(1-x+x^2)))/x)
%Y A370799 Cf. A370800, A370801.
%Y A370799 Cf. A218225.
%K A370799 sign
%O A370799 0,2
%A A370799 _Seiichi Manyama_, Mar 02 2024