OFFSET
1,2
COMMENTS
Column 2 of A300380.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 4*a(n-2) +2*a(n-3) +a(n-5) -3*a(n-6) +a(n-7)
EXAMPLE
Some solutions for n=5
..0..1. .0..1. .0..0. .0..0. .0..0. .0..0. .0..1. .0..1. .0..0. .0..0
..1..1. .1..1. .0..1. .0..1. .0..1. .0..0. .1..1. .1..1. .0..1. .0..1
..1..0. .0..1. .1..1. .1..1. .1..1. .1..0. .1..0. .0..0. .1..1. .0..0
..0..0. .1..1. .0..0. .0..0. .1..0. .0..0. .1..1. .0..1. .0..1. .1..0
..0..1. .1..0. .0..0. .0..1. .0..0. .0..1. .1..0. .1..1. .1..1. .0..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Mar 04 2018
STATUS
approved