OFFSET
1,2
COMMENTS
Row 2 of A221483.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = a(n-1) + 17*a(n-2) + 22*a(n-3) + a(n-4) - 14*a(n-5) - 2*a(n-6) + a(n-7).
Empirical g.f.: x^2*(1 - x)*(4 + 8*x + 5*x^2) / ((1 + 3*x + x^2)*(1 - 4*x - 6*x^2 + 5*x^4 - x^5)). - Colin Barker, Aug 06 2018
EXAMPLE
Some solutions for n=3:
..1..1..1....0..1..1....1..2..1....0..3..1....0..3..0....0..2..0....1..2..0
..0..3..0....1..3..0....0..2..0....1..1..0....1..1..1....1..2..1....0..2..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 17 2013
STATUS
approved