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A181007
Number of (n+3)xn binary matrices with rows and columns each in strictly increasing order as binary numbers and each row and column having an even number of 1s
0
0, 0, 0, 1, 199, 59805, 41985610, 78452652352, 425192615407453
OFFSET
1,5
COMMENTS
Subdiagonal 3 of A181004
EXAMPLE
All solutions for 7X4
..0..0..1..1
..0..1..0..1
..0..1..1..0
..1..0..0..1
..1..0..1..0
..1..1..0..0
..1..1..1..1
CROSSREFS
Sequence in context: A298251 A097732 A305413 * A155508 A028482 A111472
KEYWORD
nonn
AUTHOR
R. H. Hardin Sep 30 2010
STATUS
approved