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A088616 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. 3
0, 0, 24, 6840, 6568800 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

LINKS

Table of n, a(n) for n=1..5.

CROSSREFS

Cf. A088310.

Sequence in context: A266312 A181232 A275054 * A158042 A297049 A147860

Adjacent sequences:  A088613 A088614 A088615 * 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, Jan 03 2004.

STATUS

approved

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Last modified February 25 13:30 EST 2018. Contains 299654 sequences. (Running on oeis4.)