OFFSET
1,1
COMMENTS
Column 3 of A268092.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 27*a(n-1) -88*a(n-2) -2949*a(n-3) +19763*a(n-4) +105684*a(n-5) -917208*a(n-6) -1283256*a(n-7) +14673312*a(n-8) +279936*a(n-9) -60466176*a(n-10)
EXAMPLE
Some solutions for n=4
..0..1..1....0..1..0....0..1..1....0..2..2....0..0..0....0..2..2....0..0..1
..1..0..2....2..0..1....2..2..1....0..2..2....0..2..0....1..2..2....0..0..2
..0..2..1....1..0..1....1..0..2....1..0..0....1..2..2....1..1..0....1..1..1
..0..1..1....0..2..0....1..1..2....1..2..1....2..1..0....2..2..1....2..0..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 26 2016
STATUS
approved