OFFSET
1,1
COMMENTS
Diagonal of A188747
EXAMPLE
Some solutions for 3X3
..0..0..0....0..1..1....0..0..0....0..0..0....1..0..0....0..1..0....1..0..0
..1..0..0....1..0..0....0..1..1....1..1..1....0..1..1....0..0..0....0..0..0
..0..0..0....1..0..0....1..1..1....0..0..0....0..0..0....0..1..0....1..1..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Apr 09 2011
STATUS
approved