OFFSET
1,1
COMMENTS
Column 4 of A280284.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..176
EXAMPLE
Some solutions for n=3
..0..1..2..0. .0..1..0..2. .0..1..2..0. .0..1..0..1. .0..1..2..0
..0..2..1..1. .0..1..1..2. .1..0..2..1. .2..2..0..2. .0..1..2..0
..0..1..0..0. .2..2..0..1. .1..1..0..1. .0..1..0..1. .2..1..0..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 30 2016
STATUS
approved