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A172722 Number of n X n 0..3 arrays with row sums 6 and column sums 6 1
0, 1, 55, 27636, 45934340, 210668680701, 2310106618930215, 54450121092072227480, 2538708180710780880644304, 218999995866993338639652628800, 33082630485031588732233929380223040 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

LINKS

R. H. Hardin, Table of n, a(n) for n=1..25

CROSSREFS

Sequence in context: A163036 A033512 A201008 * A221000 A196428 A231907

Adjacent sequences:  A172719 A172720 A172721 * A172723 A172724 A172725

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 06 2010

STATUS

approved

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Last modified October 22 13:49 EDT 2021. Contains 348170 sequences. (Running on oeis4.)