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 A325871 #3 Jun 26 2019 14:23:42 %S A325871 1,1,4,3,144,40,4320,1260,134400,72576,21772800,6652800,100590336000, %T A325871 889574400,34871316480,163459296000,627683696640000,39520825344000, %U A325871 268899695640576000,12164510040883200,38231317271347200000,4644631106519040000,6744004366665646080000 %N A325871 a(n) = n!*ClausenNumber(n, 1)/(n + 1), Clausen numbers defined in A160014. %F A325871 a(n) = A194587(n, n). %p A325871 # Function Clausen defined in A160014. %p A325871 seq(n!*Clausen(n,1)/(n+1), n=0..27); %Y A325871 Cf. A160014, A194587. %K A325871 nonn %O A325871 0,3 %A A325871 _Peter Luschny_, Jun 26 2019