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A241774 Number of standard Young tableaux with n cells and exactly three successions. 1
1, 2, 9, 29, 108, 399, 1573, 6249, 25642, 107751, 466898, 2071183, 9429453, 43889227, 209111720, 1017353435, 5056450994, 25627110560, 132451351403, 697165582228, 3736595119730, 20372395392794, 112961465325799, 636497947945382, 3643481367551384 (list; graph; refs; listen; history; text; internal format)
OFFSET

4,2

COMMENTS

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

Also number of ballot sequences having three flat steps.

LINKS

Table of n, a(n) for n=4..28.

CROSSREFS

Column k=3 of A238125.

Sequence in context: A181545 A069006 A351191 * A183383 A280853 A268568

Adjacent sequences:  A241771 A241772 A241773 * A241775 A241776 A241777

KEYWORD

nonn

AUTHOR

Joerg Arndt and Alois P. Heinz, Apr 28 2014

STATUS

approved

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Last modified June 29 09:16 EDT 2022. Contains 354910 sequences. (Running on oeis4.)