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A089674
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 read in the upward direction and the main antidiagonal, are all distinct.
13
0, 0, 0, 1692, 2329280
OFFSET
1,4
CROSSREFS
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: A251291 A120564 A237533 * A252429 A126720 A366644
KEYWORD
nonn,more
AUTHOR
Vladeta Jovovic, Jan 04 2004
STATUS
approved