OFFSET
1,2
COMMENTS
Diagonal of A279741.
EXAMPLE
Some solutions for n=4:
..0..1..0..1. .0..1..0..1. .0..0..1..0. .0..1..0..1. .0..1..0..1
..0..1..0..1. .1..1..0..1. .1..0..0..1. .0..1..0..1. .0..1..0..1
..1..0..1..0. .0..1..0..1. .0..1..1..0. .1..0..1..0. .1..0..1..1
..0..0..1..0. .0..1..0..1. .1..0..1..0. .1..1..0..1. .0..1..0..1
CROSSREFS
KEYWORD
nonn,more
AUTHOR
R. H. Hardin, Dec 18 2016
STATUS
approved