OFFSET
1,1
COMMENTS
Diagonal of A184604.
EXAMPLE
Some solutions for 3 X 3:
..1..0..0....0..0..1....0..1..1....1..1..1....1..0..0....1..0..0....1..1..1
..1..1..0....1..1..0....1..0..0....1..0..0....1..0..1....1..0..1....0..0..0
..1..0..0....1..1..0....0..1..1....0..1..0....1..1..0....0..1..1....1..1..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 18 2011
STATUS
approved