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Search: id:A089673
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A089673 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 and the main anti-diagonal, are all distinct. +0
2
0, 0, 0, 652, 1658784 (list; graph; listen)
OFFSET

1,4

CROSSREFS

Cf. A088310, A088616, A089674.

Sequence in context: A127031 A127029 A127030 this_sequence A104823 A060520 A065759

Adjacent sequences: A089670 A089671 A089672 this_sequence A089674 A089675 A089676

KEYWORD

nonn

AUTHOR

Vladeta Jovovic, Jan 04, 2004

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Last modified July 26 13:41 EDT 2008. Contains 142293 sequences.


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