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A172630
Number of n X n 0..2 arrays with row sums 18 and column sums 18
0
0, 0, 0, 0, 0, 0, 0, 0, 1, 3930730108200, 41169485539316907099731250, 398638294522125203247923680009132025136, 5601898113262596673984396810254752776141437331611270
OFFSET
1,10
CROSSREFS
Sequence in context: A172646 A222558 A290504 * A186912 A288284 A233504
KEYWORD
nonn
AUTHOR
R. H. Hardin Feb 06 2010
STATUS
approved