OFFSET
1,1
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 2*a(n-1) + 13*a(n-2) + 3*a(n-3) - 13*a(n-4) + 4*a(n-5).
Empirical g.f.: x*(8 + 22*x + 4*x^2 - 17*x^3 + 4*x^4) / (1 - 2*x - 13*x^2 - 3*x^3 + 13*x^4 - 4*x^5). - Colin Barker, Sep 14 2018
EXAMPLE
Some solutions for n=4:
1 0 0 0 0 2 2 1 2 1 1 0 2 1 0 1 0 1 0 2
1 0 1 0 0 0 0 2 0 1 1 0 0 0 1 2 0 2 2 0
1 0 1 2 1 0 0 0 0 0 2 0 2 0 1 0 1 0 1 0
1 0 2 0 2 0 1 2 2 0 1 2 1 0 2 2 1 2 2 0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Sep 21 2013
STATUS
approved