OFFSET
1,2
COMMENTS
Column 3 of A270256.
EXAMPLE
Some solutions for n=4
.....2........3........3........3........3........1........0........2
....2.2......2.0......3.3......3.2......2.3......0.0......3.2......0.2
...3.3.0....2.2.0....1.1.1....0.2.0....3.2.0....2.0.1....2.2.3....0.0.1
..1.1.1.0..2.2.2.2..2.3.1.0..0.0.2.0..2.2.0.0..2.2.2.3..2.3.3.3..2.0.0.1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Mar 14 2016
STATUS
approved