A243233 Number of isoscent sequences of length n with exactly seven ascents.

436, 45146, 1830826, 45369299, 826196076, 12168531813, 153430719591, 1718168937922, 17525279293159, 165802561604726, 1474718822704304, 12459599973722036, 100805357136035992, 786035745070774366, 5938016635175121413, 43645066989439738813, 313228673357655892678

Offset

12,1

Links

Joerg Arndt and Alois P. Heinz, Table of n, a(n) for n = 12..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, 7):
seq(a(n), n=12..35);

Crossrefs

Column k=7 of A242351.

Sequence in context: A255777 A283928 A278176 * A216988 A190828 A084293

Adjacent sequences: A243230 A243231 A243232 * A243234 A243235 A243236

Keyword

nonn

Author

Joerg Arndt and Alois P. Heinz, Jun 01 2014

Status

approved