OFFSET
1,1
COMMENTS
Column 2 of A205352
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 9*a(n-1) +108*a(n-2) +739*a(n-3) +534*a(n-4) -2929*a(n-5) +8365*a(n-6) +5012*a(n-7) -23096*a(n-8) -13776*a(n-9)
EXAMPLE
Some solutions for n=4
..0..0..1....0..1..1....0..1..0....0..0..0....0..0..0....0..0..0....0..0..0
..0..0..1....0..0..2....2..3..0....1..2..0....0..0..1....1..0..0....1..1..2
..0..1..2....2..1..0....1..1..2....3..1..1....1..2..3....0..1..2....1..1..2
..1..3..3....2..1..2....1..3..2....0..1..2....0..1..3....2..1..1....2..1..0
..0..3..1....3..1..1....3..2..2....1..1..0....2..1..1....3..2..3....0..0..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 26 2012
STATUS
approved