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 A360900 #12 Feb 26 2023 06:56:13
%S A360900 1,1,1,1,-1,-4,-8,-10,2,40,115,174,22,-736,-2495,-4276,-920,20593,
%T A360900 75011,135814,17524,-788871,-2909061,-5248648,623274,38581252,
%U A360900 138036877,235567666,-134440249,-2284840691,-7698637124,-11745925435,15869626983,157479613343
%N A360900 G.f. satisfies A(x) = 1 + x/(1 + x^3)^2 * A(x/(1 + x^3)).
%H A360900 Seiichi Manyama, <a href="/A360900/b360900.txt">Table of n, a(n) for n = 0..1000</a>
%F A360900 a(0) = 1; a(n) = Sum_{k=0..floor((n-1)/3)} (-1)^k * binomial(n-2*k,k) * a(n-1-3*k).
%o A360900 (PARI) a_vector(n) = my(v=vector(n+1)); v[1]=1; for(i=1, n, v[i+1]=sum(j=0, (i-1)\3, (-1)^j*binomial(i-2*j, j)*v[i-3*j])); v;
%Y A360900 Cf. A352865, A360901.
%Y A360900 Cf. A360892.
%K A360900 sign
%O A360900 0,6
%A A360900 _Seiichi Manyama_, Feb 25 2023