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A172907 Number of n X n 0..6 arrays with row sums n and column sums n 1
1, 3, 55, 10147, 22069251, 602351808741, 215298243454580553, 1035075803117199670120995, 68263787608482538080643047338467, 62721314697296961151225820176430830979953 (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: A172748 A172822 A172873 * A172932 A172950 A172962

Adjacent sequences:  A172904 A172905 A172906 * A172908 A172909 A172910

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 06 2010

STATUS

approved

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Last modified June 22 21:29 EDT 2021. Contains 345393 sequences. (Running on oeis4.)