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 A360788 #9 Feb 20 2023 12:27:33
%S A360788 1,1,1,1,3,25,109,324,1135,8803,64189,337854,1707319,13421410,
%T A360788 121248893,894378619,6082868725,53046554917,543432115477,
%U A360788 4989423130739,42565774604131,421544374075072,4781440892689533,51342685464272591,522295380717090265
%N A360788 Expansion of Sum_{k>=0} x^k / (1 - (k*x)^3)^(k+1).
%F A360788 a(n) = Sum_{k=0..floor(n/3)} (n-3*k)^(3*k) * binomial(n-2*k,k).
%o A360788 (PARI) my(N=30, x='x+O('x^N)); Vec(sum(k=0, N, x^k/(1-(k*x)^3)^(k+1)))
%o A360788 (PARI) a(n) = sum(k=0, n\3, (n-3*k)^(3*k)*binomial(n-2*k, k));
%Y A360788 Cf. A000248, A360787.
%Y A360788 Cf. A360783.
%K A360788 nonn,easy
%O A360788 0,5
%A A360788 _Seiichi Manyama_, Feb 20 2023