OFFSET
1,2
COMMENTS
Column 4 of A278099.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
EXAMPLE
Some solutions for n=4
..0..1..2..3. .0..1..0..3. .0..1..2..3. .0..1..2..1. .0..2..3..2
..1..1..1..0. .0..2..2..2. .2..1..1..0. .3..0..3..2. .1..1..0..1
..2..3..0..3. .2..3..0..1. .3..0..2..3. .3..2..3..0. .1..3..1..0
..0..1..2..1. .1..2..1..0. .2..1..2..1. .1..2..2..1. .2..2..2..3
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 12 2016
STATUS
approved