A225966 - OEIS

%I #9 Aug 05 2015 16:56:14

%S 1,17,187,1725,14770,123810,1049683,9201893,84765839,830632443,

%T 8737884632,99283914256,1222304625766,16308650537598,235329993989098,

%U 3658770788460622,61010416134839892,1085940325012439060,20537758641146194266,410995800089222969774

%N Number of permutations of [n] having exactly 5 strong fixed blocks.

%C See A186373 for the definition of strong fixed blocks.

%H Alois P. Heinz, <a href="/A225966/b225966.txt">Table of n, a(n) for n = 13..450</a>

%F a(n) ~ 4 * n! / n^11. - _Vaclav Kotesovec_, Aug 29 2014

%Y Column k=5 of A186373.

%K nonn

%O 13,2

%A _Alois P. Heinz_, May 22 2013