A225967 - OEIS

%I #9 Aug 05 2015 16:57:55

%S 1,21,273,2874,27243,246037,2192863,19766016,183564396,1782944112,

%T 18338911012,201770228316,2392011321782,30683876823738,

%U 426312246308898,6403885291569540,103619141358704966,1797448899803758010,33259985875540203746,653383741590779444772

%N Number of permutations of [n] having exactly 6 strong fixed blocks.

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

%H Alois P. Heinz, <a href="/A225967/b225967.txt">Table of n, a(n) for n = 16..460</a>

%F a(n) ~ 5 * n! / n^14. - _Vaclav Kotesovec_, Aug 29 2014

%Y Column k=6 of A186373.

%K nonn

%O 16,2

%A _Alois P. Heinz_, May 22 2013