OFFSET
1,1
COMMENTS
Column 4 of A205626
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 136*a(n-2) +64*a(n-3) -264*a(n-4) -384*a(n-5) -1920*a(n-6) -7168*a(n-8) for n>9
EXAMPLE
Some solutions for n=4
..0..0..0..0..1....0..0..0..0..1....0..1..1..1..2....0..0..0..0..0
..0..1..0..1..2....1..1..2..2..1....1..2..1..2..0....0..0..0..0..0
..0..1..0..1..0....0..1..1..2..2....1..0..0..2..1....0..1..0..1..0
..1..1..1..1..1....2..2..0..0..1....1..1..0..0..2....2..2..0..1..2
..2..2..2..0..2....2..1..2..0..0....0..2..2..1..1....0..2..2..0..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 29 2012
STATUS
approved