OFFSET
1,3
COMMENTS
Diagonal of A181029
EXAMPLE
Some solutions for 4X4
..0..0..0..1....0..0..0..1....0..0..0..1....0..0..0..1....0..0..0..1
..0..0..0..1....0..0..0..1....0..0..0..1....0..0..0..1....0..0..0..1
..0..1..1..1....1..0..1..1....1..1..1..0....1..1..1..0....1..1..1..0
..1..1..1..0....1..1..1..0....0..1..1..1....1..0..1..1....1..1..0..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Sep 30 2010
STATUS
approved