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A180991
Number of (n+2)xn binary matrices with rows and then columns in strictly increasing order as binary numbers
0
0, 0, 4, 196, 17630, 3673129, 1986193307, 3003748718884, 13426920301736657, 185166591284225200707, 8146406517582852344067961, 1173623326436235078315237985776
OFFSET
1,3
COMMENTS
Subdiagonal 2 of A180989
EXAMPLE
All solutions for 5X3
..0..0..0....0..0..1....0..0..1....0..1..1
..0..1..1....0..1..0....0..1..1....1..0..0
..1..0..0....1..0..0....1..0..0....1..0..1
..1..0..1....1..0..1....1..0..1....1..1..0
..1..1..0....1..1..0....1..1..0....1..1..1
CROSSREFS
Sequence in context: A017546 A144044 A221197 * A279803 A209288 A263422
KEYWORD
nonn
AUTHOR
R. H. Hardin Sep 30 2010
STATUS
approved