OFFSET
1,1
COMMENTS
Row 3 of A208709.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 5*a(n-1) + 9*a(n-2) + a(n-3) - 2*a(n-4).
Empirical g.f.: 4*x*(1 + 3*x - x^3) / ((1 + x)*(1 - 6*x - 3*x^2 + 2*x^3)). - Colin Barker, Jul 06 2018
EXAMPLE
Some solutions for n=4:
0 0 0 1 0 0 1 0 0 1 0 1 0 1 1 0 0 0 1 0
0 1 0 1 0 0 1 1 0 1 0 0 1 0 0 1 1 1 1 0
1 0 0 1 1 0 0 0 0 1 1 0 1 0 1 1 0 1 0 0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Mar 01 2012
STATUS
approved