OFFSET
1,1
COMMENTS
Diagonal of A253456
EXAMPLE
Some solutions for n=4
..1..1..0..0..1....1..1..2..1..2....1..1..1..1..0....2..2..2..2..2
..2..2..1..1..2....0..0..1..0..1....1..1..1..1..0....1..1..1..1..1
..2..2..1..1..2....0..0..1..0..1....2..2..2..2..1....0..0..0..0..0
..2..2..1..1..2....1..1..2..1..2....1..1..1..1..0....1..1..1..1..1
..1..1..0..0..2....0..0..1..0..2....2..2..2..2..2....0..0..0..0..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 01 2015
STATUS
approved