OFFSET
1,1
COMMENTS
Column 4 of A278727.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..133
EXAMPLE
Some solutions for n=3
..1..0..0..0. .1..0..0..0. .2..2..1..0. .3..1..1..1. .1..1..0..0
..1..0..0..0. .3..1..0..0. .3..0..0..1. .3..2..2..0. .2..1..2..0
..1..3..1..0. .3..3..2..2. .3..2..1..0. .3..3..1..2. .3..2..1..2
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 27 2016
STATUS
approved