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 A384739 #10 Jun 09 2025 10:34:13 %S A384739 1,1,3,28,461,11776,421207,19832128,1179482201,85990657024, %T A384739 7513043962571,772836266189824,92270347493126629,12636256749099114496, %U A384739 1965364897138717976735,344225592620170387849216,67392512492360201909759153,14653181755453024592646111232,3518079370651785227796264294163 %N A384739 E.g.f. A(x) satisfies A(x) = exp( x * A(x*A(x)^2) ). %F A384739 See A384741. %o A384739 (PARI) a(n, k=1) = if(k==0, 0^n, k*sum(j=0, n, (2*n-2*j+k)^(j-1)*binomial(n, j)*a(n-j, j))); %Y A384739 Column k=1 of A384741. %Y A384739 Cf. A000272, A162659, A384740. %Y A384739 Cf. A384719, A384749. %K A384739 nonn %O A384739 0,3 %A A384739 _Seiichi Manyama_, Jun 08 2025