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

Author

Joerg Arndt and Alois P. Heinz, Apr 28 2014

Keywords

• nonn

Examples

			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.