OFFSET
1,1
COMMENTS
Diagonal of A231263
EXAMPLE
Some solutions for n=3
..0..0..0..0....0..0..1..1....0..0..1..1....0..0..0..0....0..0..0..1
..1..1..1..1....0..1..1..2....0..1..1..2....1..1..0..0....0..0..1..0
..2..2..2..2....2..2..2..0....1..2..2..0....1..2..2..0....1..1..0..2
..1..1..1..1....2..2..0..0....2..2..0..0....2..2..0..0....0..0..2..2
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 06 2013
STATUS
approved