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A241802 Number of ballot sequences of length n having exactly nine descents. 2
5, 555, 24060, 595052, 10131071, 131722015, 1394425753, 12538397433, 98654859370, 694083988620, 4440550793116, 26165677158969, 143525057166497, 738895115800678, 3596200018311737, 16639581043371855, 73574528888085621, 312133508358624077, 1275409396131467499 (list; graph; refs; listen; history; text; internal format)
OFFSET

14,1

LINKS

Table of n, a(n) for n=14..32.

EXAMPLE

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

CROSSREFS

Column k=9 of A238121 and of A238122.

Sequence in context: A303252 A112900 A259463 * A274081 A153404 A297821

Adjacent sequences:  A241799 A241800 A241801 * A241803 A241804 A241805

KEYWORD

nonn

AUTHOR

Joerg Arndt and Alois P. Heinz, Apr 28 2014

STATUS

approved

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Last modified July 3 02:07 EDT 2022. Contains 355029 sequences. (Running on oeis4.)