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 A371298 #7 Mar 18 2024 09:52:23
%S A371298 1,1,8,124,2928,93496,3773536,184354752,10580324096,697840047616,
%T A371298 52018550966784,4324989984168448,396842631019350016,
%U A371298 39833949803142014976,4342129457277000261632,510808184298890239393792,64504327889586673547673600,8703038855093947990994452480
%N A371298 E.g.f. satisfies A(x) = 2/(3 - exp(2*x*A(x)^2)).
%F A371298 a(n) = (1/(2*n+1)!) * Sum_{k=0..n} 2^(n-k) * (2*n+k)! * Stirling2(n,k).
%o A371298 (PARI) a(n) = sum(k=0, n, 2^(n-k)*(2*n+k)!*stirling(n, k, 2))/(2*n+1)!;
%Y A371298 Cf. A122704, A370894.
%Y A371298 Cf. A371296.
%K A371298 nonn
%O A371298 0,3
%A A371298 _Seiichi Manyama_, Mar 18 2024