OFFSET
1,1
COMMENTS
Row 4 of A267328.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..32
EXAMPLE
Some solutions for n=6
..0..1..2..2..3..3....0..1..2..3..0..0....0..1..2..2..3..0....0..0..0..1..2..3
..0..1..1..2..3..0....0..1..2..3..3..0....1..1..2..3..3..0....3..0..1..1..2..3
..0..1..2..2..3..0....1..1..2..2..3..0....0..1..2..3..3..0....3..0..1..1..2..2
..1..1..2..3..3..0....1..1..2..2..3..3....1..1..2..2..3..0....3..0..1..2..2..3
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 13 2016
STATUS
approved