OFFSET
1,1
COMMENTS
Column 7 of A199523
EXAMPLE
Some solutions for n=3
..0..1..1..2..2..3..3....0..0..1..2..3..3..2....0..0..1..2..2..3..2
..0..1..0..3..3..2..2....0..1..0..1..3..2..2....0..1..0..3..1..3..2
..0..0..0..3..1..1..2....0..0..3..1..1..2..3....0..0..1..3..1..3..2
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Nov 07 2011
STATUS
approved