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