A217215 A217214(n)/2.

0, 0, 0, 1, 19, 161, 1056, 6105, 32747, 167167, 823888, 3955458, 18608030, 86131826, 393439840, 1777499685, 7956046035, 35328205275, 155792097120, 682880049390, 2977333542810, 12919680832110, 55825638835200, 240301824041370, 1030811804710974, 4407949753291926, 18795204355479776

Offset

0,5

Links

Table of n, a(n) for n=0..26.

Luca Ferrari and Emanuele Munarini, Enumeration of saturated chains in Dyck lattices, arXiv preprint arXiv:1203.6807, 2012

Crossrefs

Cf. A217214.

Sequence in context: A141923 A261791 A302124 * A159682 A197500 A341398

Adjacent sequences: A217212 A217213 A217214 * A217216 A217217 A217218

Keyword

nonn

Author

N. J. A. Sloane, Oct 03 2012

Status

approved