OFFSET
1,1
COMMENTS
Column 2 of A231324.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 22*a(n-1) -776*a(n-3) +944*a(n-4) +7168*a(n-5) -12416*a(n-6) +9216*a(n-8) -4096*a(n-9).
EXAMPLE
Some solutions for n=4
..0..1..0....0..0..1....0..0..0....0..1..0....0..1..0....0..0..0....0..0..0
..0..1..2....0..2..1....1..2..1....0..1..1....2..2..0....1..2..0....1..1..1
..0..0..0....2..1..1....2..0..0....1..2..0....1..0..2....2..1..2....2..2..2
..1..0..0....2..0..0....2..1..1....2..0..2....1..1..2....2..0..0....0..2..0
..2..2..1....2..0..1....2..2..2....2..1..2....2..2..0....2..2..2....1..1..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 07 2013
STATUS
approved