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A241775
Number of standard Young tableaux with n cells and exactly four successions.
1
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.
CROSSREFS
Column k=4 of A238125.
Sequence in context: A251743 A178934 A218420 * A045908 A118589 A375653
KEYWORD
nonn
AUTHOR
Joerg Arndt and Alois P. Heinz, Apr 28 2014
STATUS
approved