OFFSET
1,3
COMMENTS
Diagonal of A297299.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..21
EXAMPLE
Some solutions for n=5
..0..0..1..1..0. .0..0..0..0..0. .0..0..0..1..1. .0..1..1..0..0
..0..1..1..0..0. .0..0..0..0..0. .0..0..1..1..0. .1..1..0..0..0
..0..0..0..0..0. .0..1..1..0..0. .0..0..0..0..0. .0..1..1..0..0
..0..0..1..1..0. .1..1..0..1..1. .0..0..0..0..0. .1..1..0..1..1
..0..1..1..0..0. .0..0..1..1..0. .0..0..0..0..0. .0..0..1..1..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 27 2017
STATUS
approved