OFFSET
1,3
COMMENTS
Row 4 of A267338.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..37
EXAMPLE
Some solutions for n=5
..0..1..1..2..3....0..1..2..3..0....0..1..1..2..3....0..1..1..2..3
..0..1..2..2..3....1..2..2..3..0....0..1..2..3..3....0..1..2..2..3
..0..1..2..3..3....1..2..3..3..0....0..1..2..3..0....0..1..2..3..0
..0..1..2..3..0....1..2..3..0..1....1..2..2..3..0....1..2..3..3..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 13 2016
STATUS
approved