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Search: id:A089674
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A089674 a(n) = number of n X n (0,1) matrices A such that the 2n+2 vectors consisting of the rows and the columns of the matrix A, as well as the main diagonal read in the upward direction and the main anti-diagonal, are all distinct. +0
2
0, 0, 0, 1692, 2329280 (list; graph; listen)
OFFSET

1,4

CROSSREFS

Cf. A088310, A088616, A089673.

Sequence in context: A065903 A062680 A120564 this_sequence A126720 A083610 A020405

Adjacent sequences: A089671 A089672 A089673 this_sequence A089675 A089676 A089677

KEYWORD

nonn

AUTHOR

Vladeta Jovovic, Jan 04, 2004

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Last modified November 29 12:46 EST 2009. Contains 167659 sequences.


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