OFFSET
1,1
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 32*a(n-2) - 48*a(n-4).
Empirical g.f.: 16*x*(5 + 27*x - 12*x^2 - 48*x^3) / (1 - 32*x^2 + 48*x^4). - Colin Barker, Oct 14 2018
EXAMPLE
Some solutions for n=5:
1 3 3 3 0 1 3 3 1 1 3 2 1 3 1 1 0 1 0 1
2 3 0 1 1 1 1 0 2 1 0 0 0 3 1 2 2 2 0 0
0 0 0 0 1 2 2 2 2 2 3 2 1 3 3 3 2 1 1 0
0 1 2 1 0 0 1 0 1 2 2 2 1 2 1 2 0 0 3 3
0 2 1 1 0 1 2 0 1 3 3 2 0 0 0 0 2 3 2 3
0 3 1 2 2 2 1 0 1 2 0 0 1 0 3 2 2 2 0 2
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 23 2013
STATUS
approved