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A088616
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a(n) = number of n X n (0,1) matrices A such that the 2n vectors consisting of the rows and the columns of the matrix A are all distinct.
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13
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OFFSET
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1,3
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LINKS
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Table of n, a(n) for n=1..5.
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CROSSREFS
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Cf. A088310.
Binary matrices with distinct rows and columns, various versions: A059202, A088309, A088310, A088616, A089673, A089674, A093466, A094000, A094223, A116532, A116539, A181230, A259763
Sequence in context: A266312 A181232 A275054 * A158042 A297049 A147860
Adjacent sequences: A088613 A088614 A088615 * A088617 A088618 A088619
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KEYWORD
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nonn,more
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AUTHOR
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Yuval Dekel and Vladeta Jovovic, Nov 17 2003
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EXTENSIONS
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What if you also ask that the two main diagonals are also distinct? - N. J. A. Sloane, Jan 03 2004.
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STATUS
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approved
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