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 A384414 #14 May 28 2025 09:19:10 %S A384414 1,73,2271421,664978095445,805854449283423655, %T A384414 2773445081734579264589407,21807207369084946567603587345091, %U A384414 339838389273170021807379637478064625867,9495034758014772381226851471008240873743234210,441461703234194795490537796224906335240071042475017490 %N A384414 Expansion of Product_{k>=1} 1/(1 - k^4 * x)^((1/30) * (2/3)^k). %F A384414 G.f.: exp((1/10) * Sum_{k>=1} b(4*k) * x^k/k), where b(n) = Sum_{k=0..n} 2^k * k! * Stirling2(n,k). %o A384414 (PARI) b(n) = sum(k=0, n, 2^k*k!*stirling(n, k, 2)); %o A384414 my(N=10, x='x+O('x^N)); Vec(exp(sum(k=1, N, b(4*k)*x^k/k)/10)) %Y A384414 Cf. A004123, A384412. %K A384414 nonn %O A384414 0,2 %A A384414 _Seiichi Manyama_, May 28 2025