OFFSET
1,3
COMMENTS
Row 5 of A270606.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..25
EXAMPLE
Some solutions for n=3
......0..........0..........0..........0..........2..........0..........0
.....0.3........0.0........2.3........0.0........0.3........0.0........0.3
....0.0.3......3.0.0......3.3.3......3.0.0......0.3.3......1.0.3......0.0.3
...0.0.3.2....0.3.3.1....3.3.2.3....3.0.1.0....3.3.3.3....3.0.3.2....0.3.0.0
..3.0.3.2.1..0.3.3.0.0..0.0.3.3.0..3.0.0.3.0..0.3.3.3.2..2.3.3.3.3..3.3.0.3.1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Mar 20 2016
STATUS
approved