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A180992
Number of (n+3)xn binary matrices with rows and then columns in strictly increasing order as binary numbers
0
0, 0, 6, 873, 194176, 91610331, 106664349231, 337206602197275, 3097011674559184126, 86891156143807447975507, 7735857823114195427126194239, 2249860503567334385742963521466736
OFFSET
1,3
COMMENTS
Subdiagonal 3 of A180989
EXAMPLE
All solutions for 6X3
..0..0..0....0..0..0....0..0..0....0..0..1....0..0..1....0..0..1
..0..0..1....0..0..1....0..1..1....0..1..0....0..1..0....0..1..1
..0..1..0....0..1..1....1..0..0....0..1..1....1..0..0....1..0..0
..1..0..0....1..0..0....1..0..1....1..0..0....1..0..1....1..0..1
..1..0..1....1..0..1....1..1..0....1..0..1....1..1..0....1..1..0
..1..1..0....1..1..0....1..1..1....1..1..0....1..1..1....1..1..1
CROSSREFS
Sequence in context: A064430 A332186 A279304 * A229629 A137801 A076667
KEYWORD
nonn
AUTHOR
R. H. Hardin Sep 30 2010
STATUS
approved