A243234 Number of isoscent sequences of length n with exactly eight ascents.

72, 22702, 1726823, 67907889, 1795511707, 36321261053, 605440292330, 8715982350668, 111865311047525, 1309224069548063, 14207107757575607, 144766250416253170, 1398869193142980670, 12919066626921248461, 114754676548076467734, 985458803547385212585

Offset

13,1

Links

Joerg Arndt and Alois P. Heinz, Table of n, a(n) for n = 13..100

Maple

b:= proc(n, i, t) option remember; `if`(n<1, 1, expand(add(
      `if`(j>i, x, 1) *b(n-1, j, t+`if`(j=i, 1, 0)), j=0..t+1)))
    end:
a:= n-> coeff(b(n-1, 0$2), x, 8):
seq(a(n), n=13..35);

Crossrefs

Column k=8 of A242351.

Sequence in context: A295599 A270254 A273629 * A246633 A157459 A159393

Adjacent sequences: A243231 A243232 A243233 * A243235 A243236 A243237

Keyword

nonn

Author

Joerg Arndt and Alois P. Heinz, Jun 01 2014

Status

approved