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A067210 Number of n X n 0..2 matrices with all row and column sums equal. +0
1
3, 9, 87, 5673, 2577513, 8459809773 (list; graph; listen)
OFFSET

1,1
CROSSREFS

Adjacent sequences: A067207 A067208 A067209 this_sequence A067211 A067212 A067213

Sequence in context: A011764 A018624 A032078 this_sequence A018654 A003225 A007663

KEYWORD

nonn

AUTHOR

Ron Hardin (rhh(AT)cadence.com), Feb 20 2002

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Last modified October 5 16:50 EDT 2008. Contains 144613 sequences.

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