A241802 Number of ballot sequences of length n having exactly nine descents.

5, 555, 24060, 595052, 10131071, 131722015, 1394425753, 12538397433, 98654859370, 694083988620, 4440550793116, 26165677158969, 143525057166497, 738895115800678, 3596200018311737, 16639581043371855, 73574528888085621, 312133508358624077, 1275409396131467499

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