OFFSET
1,1
COMMENTS
Diagonal of A207149
EXAMPLE
Some solutions for n=4
..2..1..0..1..0....1..1..0..1..0....2..2..0..1..0....0..2..0..1..0
..1..0..1..0..1....1..0..1..0..1....1..0..2..0..1....1..0..2..0..1
..0..1..0..1..0....0..1..0..1..0....0..1..0..2..0....0..1..0..2..0
..2..0..1..0..1....1..0..1..0..1....1..0..1..0..2....1..0..1..0..2
..0..2..0..1..2....0..1..0..1..0....0..1..0..1..1....0..1..0..1..2
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Feb 15 2012
STATUS
approved