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, 22080988800, 262378244741760

Offset: 1

Author

Yuval Dekel and Vladeta Jovovic, Nov 17 2003

Keywords

• nonn
• more

Comments

What if you also ask that the two main diagonals are also distinct? - N. J. A. Sloane, Jan 03 2004

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

Extensions

a(6)-a(7) from Bert Dobbelaere, May 05 2025