OFFSET
1,1
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 5*a(n-1) + 24*a(n-2) - 130*a(n-3) + 36*a(n-4) + 80*a(n-5) - 32*a(n-6).
Empirical g.f.: 2*x*(60 - 9*x - 1493*x^2 + 644*x^3 + 946*x^4 - 420*x^5) / ((1 - 5*x + 2*x^2)*(1 - 26*x^2 + 16*x^4)). - Colin Barker, Oct 15 2018
EXAMPLE
Some solutions for n=5:
2 1 2 1 2 1 1 2 1 1 0 0 2 1 1 2 2 2 1 0 0
1 1 1 0 0 0 1 1 1 1 1 0 1 1 2 2 1 0 1 1 2
0 1 2 0 1 2 2 1 0 0 1 1 2 1 1 0 0 0 0 1 1
0 2 2 1 1 1 1 1 1 0 2 1 2 2 1 2 1 0 1 1 2
0 1 0 0 1 2 0 1 0 0 1 1 2 1 1 2 0 0 2 1 1
0 2 0 0 0 0 0 0 0 0 0 1 1 1 2 2 1 0 2 0 1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 26 2013
STATUS
approved