OFFSET
1,1
COMMENTS
Column 2 of A267667.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 4*a(n-1) -2*a(n-2) -6*a(n-3) +4*a(n-4) +2*a(n-5) -a(n-6)
EXAMPLE
Some solutions for n=8
..0..1....0..1....0..1....0..1....0..0....0..1....0..1....0..0....0..0....0..1
..0..1....1..1....1..0....0..0....1..1....1..0....1..0....1..0....0..1....0..1
..0..1....1..1....0..1....1..0....0..0....0..1....1..0....0..0....1..0....0..1
..0..0....1..0....1..0....0..1....1..1....1..0....1..0....1..0....0..0....1..1
..1..1....1..1....0..0....1..0....1..1....0..1....1..1....0..1....0..0....0..0
..0..1....1..0....1..0....0..0....0..1....0..0....1..0....0..0....0..0....0..1
..0..1....1..1....1..1....0..0....1..1....0..1....0..0....1..1....1..0....0..0
..0..1....1..0....0..0....0..1....1..0....1..1....1..0....0..0....0..0....1..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 19 2016
STATUS
approved