OFFSET
1,2
COMMENTS
Column 3 of A270606.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..15
EXAMPLE
Some solutions for n=4
.....0........3........3........1........3........3........3........1
....0.3......0.2......3.3......3.0......0.3......0.3......3.0......3.0
...1.0.0....3.3.3....0.2.3....3.0.3....0.0.0....0.3.3....3.3.3....0.0.3
..3.0.3.3..3.3.0.0..0.3.3.3..0.3.0.0..0.1.1.0..1.3.3.0..2.0.0.0..0.0.0.0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Mar 20 2016
STATUS
approved