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.

0, 0, 24, 6840, 6568800

Offset

1,3

Links

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

Crossrefs

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

Keyword

nonn,more

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