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A208627 Number of Young tableaux with n 7-length rows, increasing entries down the columns and monotonic entries along the rows (first row increasing). 1
1, 1, 430, 1386529, 13675362559, 278635710716650, 9490918987253894191, 475092942773985252468181, 32104063492616280061833179530, 2760236523281606433215665762615849, 289238439981484950348089838682686986479, 35765166865735043765208026468482106363863090 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

COMMENTS

Also the number of (7*n-1)-step walks on 7-dimensional cubic lattice from (1,0,...,0) to (n,n,...,n) with positive unit steps in all dimensions such that for each point (p_1,p_2,...,p_7) we have p_1<=p_2<=...<=p_7 or p_1>=p_2>=...>=p_7.

LINKS

Table of n, a(n) for n=0..11.

CROSSREFS

Column k=7 of A208615.

Sequence in context: A165062 A203545 A230574 * A176387 A160518 A273807

Adjacent sequences:  A208624 A208625 A208626 * A208628 A208629 A208630

KEYWORD

nonn,walk

AUTHOR

Alois P. Heinz, Feb 29 2012

STATUS

approved

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Last modified July 30 02:28 EDT 2021. Contains 346346 sequences. (Running on oeis4.)