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A181265
Number of n X n binary matrices M with rows in strictly increasing order and rows of M*Mtranspose (mod 2) in strictly increasing order
0
2, 2, 6, 111, 2607, 256746, 63961223, 49499166213
OFFSET
1,1
COMMENTS
Diagonal of A181266
EXAMPLE
M and M*Mtranspose (mod 2) for 4X4
..0..1..1..0......0..0..1..1
..1..0..0..0......0..1..1..1
..1..0..1..0......1..1..0..0
..1..0..1..1......1..1..0..1
CROSSREFS
Sequence in context: A303225 A326943 A304564 * A093909 A114362 A007338
KEYWORD
nonn
AUTHOR
R. H. Hardin Oct 10 2010
STATUS
approved