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A172896
Number of n X n 0..6 arrays with row sums 15 and column sums 15
1
0, 0, 55, 1624984, 604695015651, 1519010563560867720, 21289875032822659308693914, 1419681395223483661783817488296832, 393979033195135438178790605724141071905152
OFFSET
1,3
LINKS
CROSSREFS
Sequence in context: A243315 A172856 A093255 * A201823 A115410 A250489
KEYWORD
nonn
AUTHOR
R. H. Hardin Feb 06 2010
STATUS
approved