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 A159038 #18 Jul 24 2017 07:55:46 %S A159038 8,16,48,192,960,5760,40320,322560,2903040,29030400,319334400, %T A159038 3832012800,49816166400,697426329600,10461394944000,167382319104000, %U A159038 2845499424768000,51218989645824000,973160803270656000 %N A159038 a(n) = 8 * n!. %H A159038 Luis Manuel Rivera, <a href="http://arxiv.org/abs/1406.3081">Integer sequences and k-commuting permutations</a>, arXiv preprint arXiv:1406.3081 [math.CO], 2014. %F A159038 a(n) = 8 * A000142(n) for n > 0. %p A159038 A159038 := proc(n) %p A159038 8*n! ; %p A159038 end proc: %p A159038 seq(A159038(n),n=1..10) ; # _R. J. Mathar_, Sep 30 2013 %Y A159038 Cf. A000142, A052560, A052578, A052648, A052849, A062098. %K A159038 easy,nonn %O A159038 1,1 %A A159038 _Zerinvary Lajos_, Apr 03 2009