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A180993
Number of (n+4)xn binary matrices with rows and then columns in strictly increasing order as binary numbers
0
0, 0, 4, 2200, 1283875, 1408620622, 3595756291357, 24101118080151321, 459717083252930306823, 26428405768066461371584216, 4776623401553625413419662091924
OFFSET
1,3
COMMENTS
Subdiagonal 4 of A180989
EXAMPLE
All solutions for 7X3
..0..0..0....0..0..0....0..0..0....0..0..1
..0..0..1....0..0..1....0..0..1....0..1..0
..0..1..0....0..1..0....0..1..1....0..1..1
..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....1..1..1....1..1..1
CROSSREFS
Sequence in context: A220941 A012869 A172941 * A192889 A062407 A212799
KEYWORD
nonn
AUTHOR
R. H. Hardin Sep 30 2010
STATUS
approved