OFFSET
1,1
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 3*a(n-1) + 35*a(n-2) - 81*a(n-3) - 264*a(n-4) + 144*a(n-5) + 384*a(n-6).
Empirical g.f.: 4*x*(60 + 113*x - 1555*x^2 - 2714*x^3 + 2754*x^4 + 4784*x^5) / ((1 - 3*x - 8*x^2)*(1 - 27*x^2 + 48*x^4)). - Colin Barker, Oct 17 2018
EXAMPLE
Some solutions for n=5:
3 0 3 0 3 4 4 1 2 6 1 2 1 2 6 2 0 4 7 0
1 3 5 7 6 2 1 3 3 2 4 0 7 3 4 5 3 2 4 2
4 1 7 4 2 3 5 2 1 5 6 7 5 6 1 7 2 6 2 5
2 4 3 5 4 0 3 5 7 6 7 3 6 2 3 4 4 3 6 4
4 1 0 7 0 1 7 4 6 0 1 2 5 6 4 0 0 4 7 0
5 7 4 6 7 3 0 2 4 3 7 3 6 2 6 7 4 3 4 2
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 04 2014
STATUS
approved