OFFSET
1,2
COMMENTS
Column 3 of A278610.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
EXAMPLE
Some solutions for n=3
..3..1..0. .3..2..2. .3..3..2. .3..3..0. .3..2..3. .3..0..0. .3..3..1
..0..0..3. .3..2..2. .1..1..1. .1..0..3. .2..1..1. .1..2..0. .1..3..2
..3..2..2. .1..2..0. .3..1..2. .3..2..3. .0..3..3. .2..0..0. .1..2..2
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 23 2016
STATUS
approved