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A172662 Number of 2*n X n 0..2 arrays with row sums n and column sums 2*n. 1
1, 19, 5881, 115321795, 101471705778601, 5520471267708881730181, 17949532724881770551236183389177, 3781994369388530584295658367829503216546371 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
LINKS
CROSSREFS
Sequence in context: A271588 A233464 A145214 * A201303 A013724 A067267
KEYWORD
nonn
AUTHOR
R. H. Hardin, Feb 06 2010
STATUS
approved

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Last modified February 27 12:08 EST 2024. Contains 370375 sequences. (Running on oeis4.)