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A241801 Number of ballot sequences of length n having exactly eight descents. 2
14, 932, 26865, 486170, 6385041, 66251021, 572940736, 4284412169, 28422470746, 170581304048, 939549814317, 4806572652156, 23042550110214, 104344981470162, 448963898693786, 1845829609158989, 7281093726825326, 27670464821261399, 101613723592257039 (list; graph; refs; listen; history; text; internal format)
OFFSET

13,1

LINKS

Table of n, a(n) for n=13..31.

EXAMPLE

a(13) = 14: [1,2,1,3,2,1,3,2,1,4,3,2,1], [1,2,1,3,2,1,4,2,1,5,3,2,1], [1,2,1,3,2,1,4,3,1,5,4,2,1], [1,2,1,3,2,1,4,3,2,1,3,2,1], [1,2,1,3,2,1,4,3,2,1,4,2,1], [1,2,1,3,2,1,4,3,2,1,4,3,1], [1,2,1,3,2,1,4,3,2,1,4,3,2], [1,2,1,3,2,1,4,3,2,1,5,2,1], [1,2,1,3,2,1,4,3,2,1,5,3,1], [1,2,1,3,2,1,4,3,2,1,5,3,2], [1,2,1,3,2,1,4,3,2,1,5,4,1], [1,2,1,3,2,1,4,3,2,1,5,4,2], [1,2,1,3,2,1,4,3,2,1,5,4,3], [1,2,1,3,2,1,4,3,2,5,4,3,1].

CROSSREFS

Column k=8 of A238121 and of A238122.

Sequence in context: A340259 A269610 A115458 * A337576 A199651 A241110

Adjacent sequences:  A241798 A241799 A241800 * A241802 A241803 A241804

KEYWORD

nonn

AUTHOR

Joerg Arndt and Alois P. Heinz, Apr 28 2014

STATUS

approved

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Last modified May 13 00:11 EDT 2021. Contains 343829 sequences. (Running on oeis4.)