OFFSET
1,3
COMMENTS
Row 2 of A293087.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
EXAMPLE
Some solutions for n=4
..0..1..0..0. .1..0..0..0. .1..1..0..0. .1..0..0..0. .0..0..1..0
..0..0..0..1. .0..0..1..0. .0..0..1..1. .0..1..0..0. .0..0..1..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Sep 30 2017
STATUS
approved