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 A384719 #8 Jun 08 2025 10:50:04 %S A384719 1,1,5,61,1281,39641,1655713,88312869,5792082817,454510418545, %T A384719 41802078248001,4434246169988669,535583662477158529, %U A384719 72887981688629021097,11079094119653898282337,1867050981690536859738901,346619463962928284995333377,70501622878003227432547203809 %N A384719 E.g.f. A(x) satisfies A(x) = exp( x * A(x*A(x))^2 ). %F A384719 See A384721. %o A384719 (PARI) a(n, k=1) = if(k==0, 0^n, k*sum(j=0, n, (n-j+k)^(j-1)*binomial(n, j)*a(n-j, 2*j))); %Y A384719 Column k=1 of A384721. %Y A384719 Cf. A162659, A384720. %Y A384719 Cf. A384691. %K A384719 nonn %O A384719 0,3 %A A384719 _Seiichi Manyama_, Jun 08 2025