A243232 Number of isoscent sequences of length n with exactly six ascents.

7, 1422, 61966, 1419901, 22720053, 288205741, 3105573804, 29654436325, 258037473373, 2086374808221, 15899245803550, 115413232143719, 804608004076949, 5421939004211551, 35497436998569721, 226735499246904329, 1417770877081098164, 8703370306993200829

Offset: 10

Author

Joerg Arndt and Alois P. Heinz, Jun 01 2014

Keywords

• nonn

Links

• Joerg Arndt and Alois P. Heinz, Table of n, a(n) for n = 10..100

Crossrefs

Column k=6 of A242351.

Programs

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, 6):
seq(a(n), n=10..35);