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 A370801 #8 Mar 02 2024 10:37:50
%S A370801 1,2,5,15,50,176,638,2351,8735,32523,120707,444218,1611211,5714056,
%T A370801 19578953,63495983,186784641,442718804,396470087,-4588483661,
%U A370801 -45923198497,-305945783479,-1761810468901,-9395726622973,-47743575327196,-234512941253088,-1122653095777562
%N A370801 Expansion of (1/x) * Series_Reversion( x/(x+1/(1-x+x^4)) ).
%H A370801 <a href="/index/Res#revert">Index entries for reversions of series</a>
%F A370801 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^4) ).
%o A370801 (PARI) my(N=30, x='x+O('x^N)); Vec(serreverse(x/(x+1/(1-x+x^4)))/x)
%Y A370801 Cf. A370799, A370800.
%Y A370801 Cf. A063028.
%K A370801 sign
%O A370801 0,2
%A A370801 _Seiichi Manyama_, Mar 02 2024