OFFSET
1,1
COMMENTS
Column 4 of A221035.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 22*a(n-1) -139*a(n-2) +446*a(n-3) -825*a(n-4) +817*a(n-5) -168*a(n-6) -528*a(n-7) +480*a(n-8) +48*a(n-9) -208*a(n-10) +64*a(n-11) for n>12.
EXAMPLE
Some solutions for n=3:
..1..1..1..1....0..1..1..0....1..0..0..0....1..1..0..1....0..0..0..1
..0..0..0..1....1..1..1..1....0..0..0..1....1..0..0..1....0..1..1..1
..1..1..1..0....1..0..1..1....1..0..0..0....1..1..0..0....1..1..0..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 29 2012
STATUS
approved