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

Author

Alois P. Heinz, Jun 11 2017

Keywords

• nonn

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.