OFFSET
1,1
COMMENTS
Column 7 of A219217
EXAMPLE
Some solutions for n=3
..0..0..1..1..1..1..1....0..0..0..0..2..2..2....0..0..0..0..0..0..1
..0..0..0..0..0..0..1....0..0..0..0..2..2..2....0..0..0..0..0..0..0
..1..0..0..0..0..0..2....0..0..0..2..2..2..2....0..0..2..2..1..0..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Nov 14 2012
STATUS
approved