OFFSET
1,1
COMMENTS
Column 3 of A224745.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 9*a(n-1) -8*a(n-2) -88*a(n-3) +176*a(n-4) +88*a(n-5) -352*a(n-6) +80*a(n-7) +160*a(n-8) -64*a(n-9).
EXAMPLE
Some solutions for n=3
..0..1..1..1....1..0..0..0....1..0..0..0....1..0..1..1....0..1..1..0
..1..0..1..0....0..0..0..0....0..0..0..0....0..0..0..0....1..1..0..1
..0..1..0..1....0..0..0..0....1..0..0..0....0..0..0..1....1..0..1..1
..1..0..1..1....1..1..1..1....0..0..0..0....1..1..0..1....0..1..1..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Apr 17 2013
STATUS
approved