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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 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,10

LINKS

Table of n, a(n) for n=1..13.

CROSSREFS

Sequence in context: A172646 A222558 A290504 * A186912 A288284 A233504

Adjacent sequences:  A172627 A172628 A172629 * A172631 A172632 A172633

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 06 2010

STATUS

approved

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Last modified October 2 01:30 EDT 2022. Contains 357191 sequences. (Running on oeis4.)