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A181267
Number of nX(n+1) binary matrices M with rows in strictly increasing order and rows of M*Mtranspose (mod 2) in strictly increasing order
0
4, 11, 87, 1793, 108161, 17946611, 9014442178
OFFSET
1,1
COMMENTS
Superdiagonal 1 of A181266
EXAMPLE
M and M*Mtranspose (mod 2) for 3X4
..0..0..1..1......0..1..1
..1..0..1..0......1..0..0
..1..1..1..0......1..0..1
CROSSREFS
Sequence in context: A004796 A320289 A298858 * A280036 A125888 A266894
KEYWORD
nonn
AUTHOR
R. H. Hardin Oct 10 2010
STATUS
approved