OFFSET
1,1
COMMENTS
Column 1 of A210125.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 10*a(n-1) - 19*a(n-2) - 14*a(n-3).
Empirical g.f.: x*(8 - 36*x - 23*x^2) / ((1 - 7*x)*(1 - 3*x - 2*x^2)). - Colin Barker, Jul 14 2018
EXAMPLE
Some solutions for n=4:
0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 1
0 1 1 0 0 1 0 1 0 1 0 1 1 0 0 1 1 0 0 1
2 3 0 0 0 1 1 1 0 0 1 1 0 1 1 0 2 3 0 0
2 3 0 1 1 1 2 1 2 2 1 2 1 0 0 1 1 0 0 1
3 2 0 0 0 0 2 2 1 1 2 1 0 0 0 0 0 0 1 1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Mar 17 2012
STATUS
approved