OFFSET
1,2
COMMENTS
Column 6 of A230840
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..27
EXAMPLE
Some solutions for n=3
..0..0..0..0..0..1....0..0..0..2..2..1....0..0..0..2..3..0....0..0..0..1..3..3
..1..2..1..0..1..2....1..1..0..3..0..3....1..3..1..2..1..1....1..0..3..2..0..3
..0..3..3..0..3..1....2..3..1..2..2..2....2..2..3..0..3..2....2..3..1..1..0..2
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Oct 31 2013
STATUS
approved