OFFSET
1,3
COMMENTS
Diagonal of A195969
EXAMPLE
Some solutions for n=4
..2..2..2..2....1..0..1..1....0..2..2..2....0..1..1..0....2..2..2..0
..2..0..1..2....1..2..2..0....2..2..1..2....2..2..2..2....2..1..2..1
..2..2..1..2....0..2..2..1....2..0..1..2....2..1..1..2....2..1..2..1
..0..2..2..2....1..1..0..1....2..2..2..2....2..2..2..2....2..2..2..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Sep 25 2011
STATUS
approved