OFFSET
1,2
COMMENTS
Column 3 of A239986
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
EXAMPLE
Some solutions for n=4
..3..0..0....3..0..0....3..0..0....3..0..0....3..0..0....3..0..0....3..0..0
..3..1..3....3..1..3....3..1..3....2..3..0....3..1..3....2..1..0....2..3..0
..2..1..2....3..1..3....2..1..0....2..0..0....3..2..3....2..0..0....2..0..1
..3..2..0....2..1..2....3..2..3....3..2..0....2..3..3....2..1..1....3..0..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Mar 30 2014
STATUS
approved