OFFSET
1,2
COMMENTS
Column 4 of A278610.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..132
EXAMPLE
Some solutions for n=2
..2..1..3..0. .3..1..2..1. .3..2..2..3. .3..3..1..3. .2..2..0..3
..1..3..0..1. .2..3..2..0. .1..3..0..3. .3..1..0..3. .2..1..0..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 23 2016
STATUS
approved