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A172822 Number of n X n 0..4 arrays with row sums n and column sums n 1
1, 3, 55, 10147, 21107931, 511508441781, 150603715387867113, 555249505892003620997475, 26159597034338175244538552103907, 16021054958659349444630042183181806132953 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

R. H. Hardin, Table of n, a(n) for n=1..12

CROSSREFS

Sequence in context: A002818 A119190 A172748 * A172873 A172907 A172932

Adjacent sequences:  A172819 A172820 A172821 * A172823 A172824 A172825

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 06 2010

STATUS

approved

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Last modified May 15 18:26 EDT 2021. Contains 343920 sequences. (Running on oeis4.)