OFFSET
1,1
COMMENTS
Column 6 of A206150.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 55*a(n-1) -1109*a(n-2) +11330*a(n-3) -67206*a(n-4) +247404*a(n-5) -582440*a(n-6) +881876*a(n-7) -846764*a(n-8) +499200*a(n-9) -172400*a(n-10) +33152*a(n-11) -3264*a(n-12) +128*a(n-13).
EXAMPLE
Some solutions for n=4:
..1..2..1..2..0..1..2....2..0..1..2..0..1..2....1..0..1..2..1..2..1
..0..1..0..1..2..0..1....1..2..0..1..2..0..1....2..1..2..0..2..1..0
..2..0..2..0..1..2..0....2..0..1..2..1..2..0....0..2..0..2..0..2..1
..1..2..0..2..0..1..2....0..2..0..1..2..0..2....1..0..1..0..1..0..2
..2..0..2..1..2..0..1....1..0..2..0..1..2..1....0..1..2..1..0..1..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Feb 04 2012
STATUS
approved