OFFSET
1,1
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 24*a(n-2) - 112*a(n-4).
Empirical g.f.: 4*x*(18 + 77*x - 120*x^2 - 512*x^3) / (1 - 24*x^2 + 112*x^4). - Colin Barker, Oct 13 2018
EXAMPLE
Some solutions for n=6:
4 4 3 3 4 4 3 1 1 2 2 1 2 0 0 1 3 1 1 2
2 3 1 2 3 2 2 3 2 0 1 3 1 2 0 2 2 3 0 2
1 3 2 0 4 4 3 1 1 0 1 2 0 2 2 1 3 1 1 0
1 2 1 2 3 2 1 2 0 2 1 3 2 1 0 2 3 2 0 2
0 0 0 0 4 2 3 3 1 2 3 2 3 3 1 2 4 4 1 2
1 2 1 2 4 3 1 2 1 3 2 4 1 2 1 3 3 2 2 0
0 2 1 3 2 2 3 3 3 2 3 4 1 3 3 2 1 3 1 0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 21 2013
STATUS
approved