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 A289952 #8 Jul 23 2017 03:08:11
%S A289952 105,3465,74025,1346345,23079595,391180075,6719395683,118538975555,
%T A289952 2163255564470,40995539853814,808279043604630,16591622809290774,
%U A289952 354584560193653306,7886213669622441146,182405117548079061482,4383906242299647034026,109380730176142312738279
%N A289952 Number of permutations of [n] having exactly four nontrivial cycles.
%C A289952 A nontrivial cycle has size > 1.
%H A289952 Alois P. Heinz, <a href="/A289952/b289952.txt">Table of n, a(n) for n = 8..450</a>
%H A289952 Wikipedia, <a href="https://en.wikipedia.org/wiki/Permutation">Permutation</a>
%F A289952 E.g.f.: (log(1-x)+x)^4/4!*exp(x).
%t A289952 Drop[Range[0, 30]! CoefficientList[Series[(Log[1 - x] + x)^4 / 4! Exp[x], {x, 0, 30}], x], 8] (* _Vincenzo Librandi_, Jul 23 2017 *)
%Y A289952 Column k=4 of A136394.
%K A289952 nonn
%O A289952 8,1
%A A289952 _Alois P. Heinz_, Jul 16 2017