A288543 Number of Dyck paths of semilength n such that the minimal number of peaks over all positive levels equals four.

1, 0, 0, 0, 0, 5, 56, 240, 620, 1220, 2201, 4501, 14231, 67597, 332768, 1455695, 5611277, 19525749, 63217514, 197236391, 617466587, 2015606482, 7005348816, 25768091554, 97973413377, 375778678054, 1431049415936, 5374397862025, 19899453137028, 72900123590938

Offset

4,6

Links

Alois P. Heinz, Table of n, a(n) for n = 4..300

Wikipedia, Counting lattice paths

Crossrefs

Column k=4 of A288387.

Cf. A000108.

Sequence in context: A072318 A174514 A041995 * A062125 A030060 A247710

Adjacent sequences: A288540 A288541 A288542 * A288544 A288545 A288546

Keyword

nonn

Author

Alois P. Heinz, Jun 11 2017

Status

approved