OFFSET
1,2
COMMENTS
Row 5 of A270256.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..25
EXAMPLE
Some solutions for n=2
......1..........2..........1..........2..........1..........1..........2
.....2.1........1.2........2.2........2.2........0.0........0.0........2.2
....2.2.2......2.2.2......2.2.2......2.1.2......0.1.0......0.0.0......1.2.2
...2.2.2.1....1.2.2.2....1.2.2.1....2.2.2.1....1.0.0.1....0.1.1.0....2.2.2.2
..2.2.2.2.2..1.2.1.2.2..2.2.1.0.0..2.1.2.2.1..2.1.0.0.0..1.0.0.0.0..2.1.1.2.2
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Mar 14 2016
STATUS
approved