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 A377745 #9 Nov 06 2024 04:38:04
%S A377745 1,3,35,865,32917,1699311,111033607,8788108477,817439352233,
%T A377745 87406186549339,10564550856634411,1424421297360350169,
%U A377745 211968687043802337469,34509326697582566247367,6101526326400539736369935,1164298084658023787974823221,238495519792465232104337607505
%N A377745 E.g.f. satisfies A(x) = exp(x) / (1 - x * A(x)^2)^2.
%F A377745 a(n) = n! * Sum_{k=0..n} (2*k+1)^(n-k-1) * binomial(5*k+1,k)/(n-k)!.
%o A377745 (PARI) a(n) = n!*sum(k=0, n, (2*k+1)^(n-k-1)*binomial(5*k+1, k)/(n-k)!);
%Y A377745 Cf. A001339, A377742.
%Y A377745 Cf. A371318.
%K A377745 nonn
%O A377745 0,2
%A A377745 _Seiichi Manyama_, Nov 06 2024