OFFSET
1,1
COMMENTS
Column 3 of A305586.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
Simon Plouffe Conjectures of the OEIS, as of June 20, 2018.
FORMULA
Empirical: a(n) = a(n-1) +a(n-2) +a(n-3) for n>5
Empirical: f(x)= -(2*x^4-5*x^3-x^2-x+4)*x/(x^3+x^2+x-1). - Simon Plouffe, Jun 20 2018
EXAMPLE
Some solutions for n=5
..0..0..0. .0..1..1. .0..0..1. .0..0..0. .0..1..1. .0..0..1. .0..0..1
..0..1..0. .1..0..1. .0..1..0. .0..0..0. .1..0..1. .0..1..0. .0..1..0
..0..0..0. .1..1..1. .0..0..0. .0..0..0. .1..1..1. .0..0..0. .0..0..0
..0..0..0. .1..0..1. .0..1..0. .0..1..0. .1..1..1. .0..1..0. .0..1..0
..0..0..0. .1..1..1. .0..0..1. .0..0..0. .1..1..1. .1..0..0. .0..0..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jun 05 2018
STATUS
approved