OFFSET
1,1
COMMENTS
Row 4 of A266878.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..20
EXAMPLE
Some solutions for n=4
..0..0..1..1....0..1..3..2....0..1..2..3....0..0..3..2....0..1..2..3
..0..2..3..1....2..0..3..2....3..0..1..1....2..3..3..2....2..3..1..2
..2..0..1..3....1..0..3..2....2..2..3..0....1..1..2..1....0..2..3..1
..2..2..3..3....1..0..3..1....0..1..2..3....3..0..1..0....0..0..1..3
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 05 2016
STATUS
approved