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A181277
Number of nX(n+3) binary matrices M with rows in strictly increasing order and rows of M*Mtranspose (mod 2) in strictly decreasing order
0
16, 188, 6060, 507052, 115127924, 76961864884
OFFSET
1,1
COMMENTS
Superdiagonal 3 of A181274
EXAMPLE
M and M*Mtranspose (mod 2) for 3X6
..0..1..0..1..0..1......1..1..1
..0..1..1..0..1..0......1..1..0
..1..0..1..1..1..0......1..0..0
CROSSREFS
Sequence in context: A240361 A016292 A231834 * A181269 A004333 A016237
KEYWORD
nonn
AUTHOR
R. H. Hardin Oct 10 2010
STATUS
approved