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A181015
Number of nX(n+4) binary matrices with rows and columns each in strictly increasing order as binary numbers and every 0 adjacent to a 1 and every 1 adjacent to a 0
0
0, 0, 0, 0, 0, 0, 85, 14885, 4279160, 2134653096, 2320636820510, 6138217538155860
OFFSET
1,7
COMMENTS
Superdiagonal 4 of A181011
EXAMPLE
Some solutions for 7X11
..0..1..1..1..1..1..1..1..1..1..1....0..1..1..1..1..1..1..1..1..1..1
..1..0..0..0..0..0..0..0..0..0..0....1..0..0..0..0..0..0..0..0..0..0
..1..0..0..1..1..1..1..1..1..1..1....1..0..0..1..1..1..1..1..1..1..1
..1..0..1..0..0..0..0..1..1..1..1....1..0..1..0..0..0..0..0..0..1..1
..1..0..1..0..0..1..1..0..0..0..0....1..0..1..0..0..1..1..1..1..0..0
..1..0..1..0..0..1..1..0..0..1..1....1..0..1..0..1..0..0..1..1..0..1
..1..0..1..0..1..0..1..0..1..0..1....1..0..1..0..1..0..1..0..1..0..0
CROSSREFS
Sequence in context: A011813 A006106 A015338 * A131750 A239269 A068749
KEYWORD
nonn
AUTHOR
R. H. Hardin Sep 30 2010
STATUS
approved