OFFSET
1,1
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = a(n-2) + 3*a(n-4) + 2*a(n-6) for n>12.
Empirical g.f.: x*(36 + 39*x + 24*x^2 + 58*x^3 - 14*x^4 + 33*x^5 - 14*x^6 + 2*x^7 + 3*x^8 - 5*x^9 - 2*x^11) / (1 - x^2 - 3*x^4 - 2*x^6). - Colin Barker, Dec 30 2018
EXAMPLE
Some solutions for n=4:
0 1 0 1 0 0 1 0 1 1 0 0 0 1 0 1 0 1 1 0 1
1 0 0 1 0 0 0 0 1 0 1 0 1 0 1 0 0 1 0 1 0
0 1 0 0 1 0 0 0 0 1 0 1 0 1 0 0 0 0 0 0 1
1 0 1 1 0 1 0 1 1 0 1 0 1 0 1 1 0 1 0 1 0
0 1 0 0 1 0 1 1 0 1 0 0 0 0 0 0 1 0 1 0 1
0 0 1 1 0 1 0 0 0 0 1 0 0 0 1 1 0 0 0 0 0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Aug 17 2015
STATUS
approved