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 A225970 #9 Aug 05 2015 17:03:22 %S A225970 1,33,627,9073,111870,1248766,13110889,132972135,1329550237, %T A225970 13327791693,135953350084,1431074091372,15754008527799, %U A225970 183668908342603,2292564722628641,30882981325870191,450836857113720902,7132752605955632598,121911367111794972727 %N A225970 Number of permutations of [n] having exactly 9 strong fixed blocks. %C A225970 See A186373 for the definition of strong fixed blocks. %H A225970 Alois P. Heinz, <a href="/A225970/b225970.txt">Table of n, a(n) for n = 25..470</a> %F A225970 a(n) ~ 8 * n! / n^23. - _Vaclav Kotesovec_, Aug 29 2014 %Y A225970 Column k=9 of A186373. %K A225970 nonn %O A225970 25,2 %A A225970 _Alois P. Heinz_, May 22 2013