OFFSET
1,1
COMMENTS
Subdiagonal 7 of A268956.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..115
EXAMPLE
Some solutions for n=3
..0. .0. .0. .0. .0. .0. .0. .0. .0. .0. .0. .0. .0. .0. .0. .0
..1. .1. .1. .1. .1. .1. .1. .1. .0. .1. .1. .1. .1. .1. .1. .0
..1. .2. .2. .2. .2. .0. .2. .2. .1. .0. .2. .0. .1. .0. .0. .1
..2. .0. .3. .3. .2. .0. .3. .0. .0. .2. .0. .0. .2. .2. .2. .2
..1. .2. .2. .1. .0. .2. .2. .3. .2. .2. .2. .1. .1. .3. .2. .0
..0. .0. .1. .1. .1. .2. .1. .0. .2. .3. .0. .2. .0. .0. .3. .3
..1. .1. .0. .0. .3. .1. .1. .0. .0. .1. .0. .0. .3. .2. .0. .0
..2. .1. .3. .0. .3. .2. .2. .2. .2. .0. .2. .1. .2. .3. .0. .3
..2. .2. .3. .1. .2. .0. .2. .3. .1. .1. .0. .2. .2. .2. .3. .3
..0. .2. .2. .1. .3. .3. .3. .0. .3. .0. .1. .3. .3. .1. .2. .0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Feb 16 2016
STATUS
approved