OFFSET
1,1
COMMENTS
Column 3 of A300182.
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) = 7*a(n-1) +7*a(n-2) +6*a(n-3).
Empirical g.f.: -x*(-3*x^2-4*x-4)/(-6*x^3-7*x^2-7*x+1). - Simon Plouffe, Jun 21 2018
EXAMPLE
Some solutions for n=5
..0..1..1. .0..1..1. .0..0..0. .0..1..1. .0..1..0. .0..0..1. .0..0..1
..1..1..0. .0..0..1. .0..1..1. .1..1..0. .0..1..1. .0..0..1. .1..1..0
..1..1..1. .0..0..0. .0..1..0. .0..0..0. .1..0..0. .1..1..0. .0..1..0
..0..0..1. .0..1..1. .0..0..0. .1..1..1. .1..1..1. .0..0..1. .0..1..1
..1..0..0. .0..1..1. .1..1..0. .0..0..1. .1..0..1. .0..0..0. .0..0..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Feb 27 2018
STATUS
approved