A241775 Number of standard Young tableaux with n cells and exactly four successions.

1, 3, 13, 49, 201, 802, 3343, 14368, 62909, 282989, 1299074, 6111610, 29330177, 143869556, 719339872, 3669604633, 19062972671, 100880716332, 543086732800, 2974442015323, 16556687511535, 93655725178808, 537951557765438, 3137040309057826, 18560431188723607

Offset

5,2

Comments

A succession is a pair of cells (v, v+1) lying in the same row.

Also number of ballot sequences having four flat steps.

Links

Table of n, a(n) for n=5..29.

Crossrefs

Column k=4 of A238125.

Sequence in context: A251743 A178934 A218420 * A045908 A118589 A375653

Adjacent sequences: A241772 A241773 A241774 * A241776 A241777 A241778

Keyword

nonn

Author

Joerg Arndt and Alois P. Heinz, Apr 28 2014

Status

approved