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URL: https://oeis.org/A172899

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A172899
Number of n X n 0..6 arrays with row sums 7 and column sums 7.
1
0, 6, 606, 371272, 966989100, 8540999195040, 215298243454580553, 13576914921321831895872, 1932115872363940267546247712, 571313477490432486300617373331200
OFFSET
1,2
LINKS
CROSSREFS
Sequence in context: A134367 A255886 A300389 * A384146 A222831 A206458
KEYWORD
nonn
AUTHOR
R. H. Hardin, Feb 06 2010
STATUS
approved