OFFSET
1,4
COMMENTS
Diagonal of A181004
EXAMPLE
All solutions for 4X4
..0..0..0..0....0..0..1..1....0..0..1..1
..0..0..1..1....0..1..0..1....0..1..0..1
..0..1..0..1....1..0..1..0....1..0..0..1
..0..1..1..0....1..1..0..0....1..1..1..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Sep 30 2010
STATUS
approved