A279294 - OEIS

%I #4 Dec 09 2016 15:21:05

%S 1,14,597,11486,265354,5307274,110325975,2250025170,46909998946,

%T 990648740298,21419845540563,473829924582378,10757656204264520,

%U 250739074393237162,6005432933786523655,147819656394632180730,3739797338380838531829,97237232835306526768108

%N Number of permutations of [n] having exactly five (possibly overlapping) doubledescents.

%H Alois P. Heinz, <a href="/A279294/b279294.txt">Table of n, a(n) for n = 7..461</a>

%Y Column k=5 of A162975.

%K nonn

%O 7,2

%A _Alois P. Heinz_, Dec 09 2016