A244197 Number of ballot sequences of length n having largest descent 1.

1, 4, 13, 37, 100, 265, 694, 1828, 4815, 12867, 34562, 93921, 257222, 711872, 1983045, 5574177, 15766834, 44933155, 128790245, 371524353, 1077235107, 3141337862, 9203553458, 27098846070, 80132014258, 238015962210, 709753556178, 2125009374481, 6385306585616

Offset

3,2

Links

Table of n, a(n) for n=3..31.

Crossrefs

Column k=1 of A238128.

Sequence in context: A226866 A048474 A054761 * A300985 A080145 A097551

Adjacent sequences: A244194 A244195 A244196 * A244198 A244199 A244200

Keyword

nonn

Author

Joerg Arndt and Alois P. Heinz, Jun 22 2014

Status

approved