OFFSET
1,1
COMMENTS
Column 7 of A218842
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..20
EXAMPLE
Some solutions for n=3
..0..0..1..0..0..0..1....0..0..0..1..1..0..0....0..0..1..1..0..0..1
..1..0..0..0..0..0..0....0..1..0..0..0..0..1....0..0..0..0..1..0..0
..0..1..1..1..0..0..0....0..0..0..1..1..0..0....0..0..0..1..0..0..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Nov 07 2012
STATUS
approved