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A172723 Number of n X n 0..3 arrays with row sums 4 and column sums 4 1
0, 3, 87, 8515, 1992760, 971853075, 887226868605, 1397573379100570, 3564687080800036800, 13994422270858878448950, 81142871841524279822631750, 671520101271652710399345719850, 7707138964962257026620598104320400 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

R. H. Hardin, Table of n, a(n) for n=1..55

CROSSREFS

Sequence in context: A279131 A230670 A232069 * A331645 A037112 A093748

Adjacent sequences:  A172720 A172721 A172722 * A172724 A172725 A172726

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 06 2010

STATUS

approved

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Last modified November 28 13:47 EST 2021. Contains 349413 sequences. (Running on oeis4.)