OFFSET
1,1
COMMENTS
Diagonal of A231396
EXAMPLE
Some solutions for n=5
..0..0..0..1..0..0....0..0..0..1..1..1....0..0..1..1..1..0....0..0..0..0..0..0
..0..0..1..0..1..0....0..0..0..1..1..1....0..1..1..1..0..0....1..1..0..0..2..2
..1..1..0..1..0..1....0..0..1..0..0..0....0..0..1..1..0..0....1..1..1..2..2..2
..1..1..1..0..1..1....1..1..1..1..0..0....0..0..1..1..1..0....2..2..2..1..1..1
..1..1..0..0..1..1....1..1..1..1..0..0....0..0..1..1..0..0....2..2..2..2..1..1
..1..1..0..0..0..1....1..1..1..0..0..0....0..0..1..1..0..0....2..2..2..2..2..2
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 08 2013
STATUS
approved