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 A225968 #9 Aug 05 2015 17:00:08 %S A225968 1,25,375,4439,46240,449376,4226604,39474916,373382588,3635491860, %T A225968 36957484104,397181210056,4560293779650,56383382731802, %U A225968 754184534296262,10926207562498862,171119131459887864,2885501334257214456,52124282589435604908,1003403354618592544692 %N A225968 Number of permutations of [n] having exactly 7 strong fixed blocks. %C A225968 See A186373 for the definition of strong fixed blocks. %H A225968 Alois P. Heinz, <a href="/A225968/b225968.txt">Table of n, a(n) for n = 19..460</a> %F A225968 a(n) ~ 6 * n! / n^17. - _Vaclav Kotesovec_, Aug 29 2014 %Y A225968 Column k=7 of A186373. %K A225968 nonn %O A225968 19,2 %A A225968 _Alois P. Heinz_, May 22 2013