OFFSET
1,2
COMMENTS
Column 5 of A221890
EXAMPLE
Some solutions for n=4
..0..0..2..3..1....1..2..2..2..1....0..3..3..1..0....0..2..2..1..0
..0..3..2..1..0....0..1..2..2..0....0..0..0..2..1....1..0..0..3..1
..0..2..1..0..0....0..2..0..1..0....0..1..1..2..1....0..2..2..3..0
..1..0..1..3..0....1..1..1..1..0....1..2..1..1..0....0..0..1..1..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 30 2013
STATUS
approved