OFFSET
1,1
COMMENTS
Column 3 of A208796
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 4*a(n-1) +123*a(n-2) +332*a(n-3) -170*a(n-4) -796*a(n-5) +124*a(n-6) +464*a(n-7) -88*a(n-8) -16*a(n-9)
EXAMPLE
Some solutions for n=4
..0..1..0....2..1..0....1..2..1....2..0..1....0..1..2....2..1..2....2..0..1
..2..0..2....0..2..2....2..1..1....0..0..2....1..2..0....1..2..1....0..0..2
..0..0..1....1..0..2....1..0..1....2..0..0....0..2..0....0..2..1....1..0..2
..1..0..0....2..2..2....2..2..2....1..0..1....2..0..1....1..2..2....2..2..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Mar 01 2012
STATUS
approved