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A243233 Number of isoscent sequences of length n with exactly seven ascents. 2
436, 45146, 1830826, 45369299, 826196076, 12168531813, 153430719591, 1718168937922, 17525279293159, 165802561604726, 1474718822704304, 12459599973722036, 100805357136035992, 786035745070774366, 5938016635175121413, 43645066989439738813, 313228673357655892678 (list; graph; refs; listen; history; text; internal format)
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
KEYWORD
nonn
AUTHOR
Joerg Arndt and Alois P. Heinz, Jun 01 2014
STATUS
approved

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Last modified June 25 11:48 EDT 2024. Contains 373701 sequences. (Running on oeis4.)