OFFSET
1,1
COMMENTS
Column 6 of A189905.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..200
EXAMPLE
Some solutions for 4 X 6
..0..0..0..0..0..0....0..0..0..0..0..1....0..0..0..0..0..1....0..0..0..0..0..0
..0..1..0..1..0..0....1..1..1..1..0..1....1..0..1..1..1..1....1..0..1..0..0..0
..0..1..0..0..1..0....0..0..0..1..0..1....0..1..0..0..1..0....0..0..1..0..0..0
..0..0..0..0..0..0....0..1..1..1..0..0....0..0..1..0..0..0....1..0..1..0..1..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, May 01 2011
STATUS
approved