OFFSET
1,1
COMMENTS
Column 7 of A180985
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..200
EXAMPLE
Some solutions for 3X7
..0..0..0..0..0..0..1....0..0..0..0..0..1..1....0..0..1..1..1..1..1
..0..1..1..1..1..1..1....0..0..0..0..0..1..1....0..1..0..0..0..1..1
..1..0..0..0..1..1..1....0..1..1..1..1..0..0....1..1..1..1..1..0..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 09 2011
STATUS
approved