OFFSET
1,1
COMMENTS
Column 2 of A232149.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 5*a(n-1) + 6*a(n-2) + 8*a(n-3) + 3*a(n-4) - 8*a(n-5) - 5*a(n-6).
Empirical g.f.: x*(3 + 8*x + 12*x^2 - 11*x^4 - 5*x^5) / (1 - 5*x - 6*x^2 - 8*x^3 - 3*x^4 + 8*x^5 + 5*x^6). - Colin Barker, Mar 19 2018
EXAMPLE
Some solutions for n=6:
..2..2....1..2....1..2....0..1....2..1....1..2....1..2....0..2....1..0....0..1
..0..2....2..0....2..1....2..2....2..1....2..2....0..1....2..1....1..2....2..1
..2..1....0..1....0..1....2..2....1..0....2..1....2..2....0..1....0..2....2..1
..0..0....1..0....1..2....1..1....1..2....1..2....1..0....2..1....2..1....0..0
..1..2....2..2....1..2....2..1....2..1....2..2....2..1....2..1....2..1....1..2
..1..2....1..2....1..2....0..2....2..1....2..1....0..2....1..2....0..2....2..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 19 2013
STATUS
approved