A279294 Number of permutations of [n] having exactly five (possibly overlapping) doubledescents.

1, 14, 597, 11486, 265354, 5307274, 110325975, 2250025170, 46909998946, 990648740298, 21419845540563, 473829924582378, 10757656204264520, 250739074393237162, 6005432933786523655, 147819656394632180730, 3739797338380838531829, 97237232835306526768108

Offset

7,2

Links

Alois P. Heinz, Table of n, a(n) for n = 7..461

Crossrefs

Column k=5 of A162975.

Sequence in context: A041845 A205327 A291121 * A282053 A209678 A280676

Adjacent sequences: A279291 A279292 A279293 * A279295 A279296 A279297

Keyword

nonn

Author

Alois P. Heinz, Dec 09 2016

Status

approved