OFFSET
1,1
COMMENTS
Column 2 of A282399.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 3*a(n-1) +a(n-2) +7*a(n-3) -2*a(n-4) -4*a(n-6).
Empirical: G.f.: -x*(-4-4*x-5*x^2+2*x^3+4*x^4+4*x^5) / ( 1-3*x-x^2-7*x^3+2*x^4+4*x^6 ). - R. J. Mathar, Feb 28 2017
EXAMPLE
Some solutions for n=4
..0..0. .1..0. .0..0. .1..1. .0..1. .1..0. .0..0. .0..0. .1..1. .1..0
..0..1. .1..0. .1..0. .0..0. .0..0. .0..1. .0..0. .0..0. .0..1. .0..1
..0..1. .1..1. .1..1. .0..0. .0..0. .1..0. .1..1. .1..0. .1..0. .1..0
..0..1. .1..0. .0..0. .1..1. .1..1. .0..0. .0..0. .1..1. .1..1. .0..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Feb 14 2017
STATUS
approved