OFFSET
1,1
COMMENTS
Diagonal of A188508
EXAMPLE
Some solutions for 3X3
..1..1..1....1..1..1....1..0..1....0..0..0....0..0..1....0..0..1....1..0..0
..1..1..1....0..0..0....1..0..0....1..0..0....0..0..0....0..0..1....1..0..1
..0..0..1....1..1..1....0..0..0....1..1..1....0..0..0....1..1..0....1..1..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Apr 02 2011
STATUS
approved