id:A088616 - OEIS Search Results

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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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0, 0, 24, 6840, 6568800 (list; graph; listen)

	OFFSET	`1,3`
	CROSSREFS	`Cf. A088310.` `Sequence in context: A002198 A163576 A145408 this_sequence A158042 A147860 A159409` `Adjacent sequences: A088613 A088614 A088615 this_sequence A088617 A088618 A088619`
	KEYWORD	`nonn`
	AUTHOR	`Yuval Dekel and Vladeta Jovovic, Nov 17 2003`
	EXTENSIONS	`What if you also ask that the two main diagonals are also distinct? - N. J. A. Sloane (njas(AT)research.att.com), Jan 03 2004.`

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Last modified November 24 23:16 EST 2009. Contains 167481 sequences.