OFFSET
1,1
COMMENTS
Column 2 of A202447.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 3*a(n-1) -2*a(n-2) -2*a(n-3) +3*a(n-4) -a(n-5) for n>6.
Empirical g.f.: 2*x*(69 - 94*x - 13*x^2 + 87*x^3 - 48*x^4 + 7*x^5) / ((1 - x)^4*(1 + x)). - Colin Barker, May 28 2018
EXAMPLE
Some solutions for n=4:
0 0 0 0 1 0 1 0 1 1 1 1 0 0 0 0 1 0 1 0
0 1 1 1 0 0 0 0 1 0 1 0 1 1 1 1 0 0 0 0
0 1 0 1 1 0 1 0 1 1 1 1 1 0 1 0 1 0 0 0
0 1 1 1 0 0 0 0 1 0 1 1 1 0 1 1 1 0 0 0
0 1 1 1 1 0 1 0 1 0 1 1 1 0 1 1 1 0 0 0
0 1 1 1 0 0 0 0 1 0 1 1 1 0 1 1 1 0 0 0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 19 2011
STATUS
approved