OFFSET
1,1
COMMENTS
Column 3 of A272973.
EXAMPLE
Some solutions for n=3
..1..0..0. .0..1..1. .1..0..1. .0..1..1. .1..0..0. .0..0..1. .0..0..0
..1..0..0. .0..0..0. .1..0..1. .1..0..0. .1..0..1. .0..0..1. .1..0..1
..0..1..1. .0..1..1. .0..0..0. .1..0..0. .0..0..1. .1..1..0. .1..0..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, May 11 2016
STATUS
approved