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 A371118 #9 Mar 11 2024 08:29:34
%S A371118 1,0,0,6,12,40,900,8568,80640,1170720,19625760,335079360,6259524480,
%T A371118 132897697920,3078950434560,75934287475200,2010354982272000,
%U A371118 57241482249369600,1735591000023336960,55694476130213652480,1889613850762113638400
%N A371118 E.g.f. satisfies A(x) = 1 - x^2*log(1 - x*A(x)).
%F A371118 a(n) = n! * Sum_{k=0..floor(n/3)} |Stirling1(n-2*k,k)|/(n-3*k+1)!.
%o A371118 (PARI) a(n) = n!*sum(k=0, n\3, abs(stirling(n-2*k, k, 1))/(n-3*k+1)!);
%Y A371118 Cf. A138013, A371117.
%Y A371118 Cf. A371116.
%K A371118 nonn
%O A371118 0,4
%A A371118 _Seiichi Manyama_, Mar 11 2024