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 antidiagonal, are all distinct.

0, 0, 0, 652, 1658784

Offset

1,4

Links

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

Crossrefs

Cf. A088310, A088616, A089674.

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: A204505 A350979 A188414 * A104823 A198170 A145125

Adjacent sequences: A089670 A089671 A089672 * A089674 A089675 A089676

Keyword

nonn,more

Author

Vladeta Jovovic, Jan 04 2004

Status

approved