OFFSET
1,2
COMMENTS
Column 3 of A199523
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..21
EXAMPLE
Some solutions for n=3
..0..0..1....0..0..1....0..1..1....0..1..1....0..1..0....0..1..0....0..1..2
..2..2..3....2..1..2....2..3..0....2..3..3....1..2..3....2..1..2....3..0..3
..2..1..3....3..0..3....3..2..2....2..0..2....2..0..3....3..3..2....1..2..2
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Nov 07 2011
STATUS
approved