OFFSET
1,1
COMMENTS
Diagonal of A254978
EXAMPLE
Some solutions for n=3
..1..1..1..0..0....1..1..1..0..0....1..1..1..1..0....1..0..1..0..1
..0..1..1..1..0....0..0..1..1..0....1..1..1..1..0....0..1..1..1..1
..1..1..1..1..1....1..1..1..1..1....0..1..1..1..1....1..1..0..1..1
..1..1..1..1..1....1..1..1..1..0....1..1..1..1..1....0..1..1..1..1
..1..0..1..0..1....0..0..1..1..1....1..0..1..0..1....1..0..1..0..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Feb 11 2015
STATUS
approved