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 A377330 #9 Oct 25 2024 09:29:44
%S A377330 1,1,9,163,4537,171451,8206517,476071275,32469361617,2546397256651,
%T A377330 225784275815485,22336278201427675,2439097416667718297,
%U A377330 291422424985108052091,37817207428965579915333,5296739332085114983427083,796419825874139713780172449,127955324543685857975407200235
%N A377330 E.g.f. satisfies A(x) = 1 + A(x)^2 * (exp(x*A(x)^2) - 1).
%F A377330 a(n) = Sum_{k=0..n} (2*n+2*k)!/(2*n+k+1)! * Stirling2(n,k).
%o A377330 (PARI) a(n) = sum(k=0, n, (2*n+2*k)!/(2*n+k+1)!*stirling(n, k, 2));
%Y A377330 Cf. A052750, A367134, A367180.
%K A377330 nonn
%O A377330 0,3
%A A377330 _Seiichi Manyama_, Oct 25 2024