OFFSET
1,2
COMMENTS
Column 4 of A221804
EXAMPLE
Some solutions for n=3
..0..1..2..0....1..1..0..0....1..0..0..0....0..2..0..0....0..4..1..0
..0..2..1..1....3..0..0..3....2..3..2..0....1..2..2..0....1..1..1..0
..1..2..1..1....0..2..1..1....1..1..1..1....1..2..1..1....1..1..2..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 26 2013
STATUS
approved