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A243234
Number of isoscent sequences of length n with exactly eight ascents.
2
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: A270254 A273629 A373650 * A246633 A157459 A159393
KEYWORD
nonn
AUTHOR
Joerg Arndt and Alois P. Heinz, Jun 01 2014
STATUS
approved