A279297 Number of permutations of [n] having exactly eight (possibly overlapping) doubledescents.

1, 20, 4280, 127917, 6402984, 208910728, 7440888001, 237920318012, 7682498246390, 241437687882797, 7610900307811180, 239466123419848086, 7589962647890648579, 242520044163828141976, 7839783867491553405462, 256717246780820798056943, 8529320594216231644881865

Offset

10,2

Links

Alois P. Heinz, Table of n, a(n) for n = 10..459

Crossrefs

Column k=8 of A162975.

Sequence in context: A332265 A177323 A184891 * A079759 A109894 A227765

Adjacent sequences: A279294 A279295 A279296 * A279298 A279299 A279300

Keyword

nonn

Author

Alois P. Heinz, Dec 09 2016

Status

approved