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A172923 Number of n X n 0..7 arrays with row sums 9 and column sums 9 1
0, 6, 1216, 2113288, 20095347085, 828045453260560, 122498884159587560730, 56021411242071401516696320, 70241609479301663107223809203427, 218979482042361137186381999071773029400 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

R. H. Hardin, Table of n, a(n) for n=1..15

CROSSREFS

Sequence in context: A159717 A160857 A160005 * A131675 A263437 A001324

Adjacent sequences:  A172920 A172921 A172922 * A172924 A172925 A172926

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 06 2010

STATUS

approved

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Last modified January 26 16:03 EST 2022. Contains 350599 sequences. (Running on oeis4.)