OFFSET
1,1
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 16*a(n-2) - 65*a(n-4) + 14*a(n-6).
Empirical g.f.: 4*x*(18 + 53*x - 144*x^2 - 424*x^3 + 30*x^4 + 95*x^5) / ((1 - 7*x^2)*(1 - 9*x^2 + 2*x^4)). - Colin Barker, Oct 17 2018
EXAMPLE
Some solutions for n=4:
2 3 2 4 0 4 2 1 1 3 3 0 3 1 5 2 2 4 3 1
5 1 5 2 2 1 1 5 3 0 2 4 0 3 2 4 3 0 2 5
3 4 1 3 1 5 2 1 0 2 4 1 3 1 5 2 2 4 3 1
5 1 5 2 4 3 1 5 4 1 1 3 0 3 1 3 4 1 1 4
1 2 2 4 1 5 3 2 3 5 4 1 2 0 3 0 3 5 2 0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 04 2014
STATUS
approved