OFFSET
1,2
COMMENTS
Column 3 of A268472.
EXAMPLE
Some solutions for n=4
..2..3..3. .3..2..1. .0..1..2. .2..0..1. .1..3..2. .0..3..2. .3..2..1
..1..0..2. .1..3..0. .3..2..0. .3..1..2. .2..0..1. .1..3..1. .0..1..0
..3..1..1. .0..0..2. .2..0..1. .1..3..3. .1..3..0. .2..0..1. .1..3..3
..0..2..0. .2..1..3. .1..3..3. .0..2..0. .2..0..3. .3..0..2. .2..0..2
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Feb 05 2016
STATUS
approved