OFFSET
1,2
COMMENTS
Diagonal of A185750
EXAMPLE
Some solutions for 3X3
..1..1..0....0..0..0....0..0..0....1..0..0....0..0..1....0..1..1....1..1..0
..0..1..1....1..1..1....0..0..0....0..0..1....1..1..1....1..1..1....1..1..1
..0..1..0....1..0..0....1..1..1....0..1..1....1..0..0....1..0..1....0..1..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Feb 01 2011
STATUS
approved