

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.


13




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



