OFFSET
1,2
COMMENTS
Column 3 of A316953.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 6*a(n-1) +10*a(n-2) +15*a(n-3) +8*a(n-4) +3*a(n-5) +a(n-6) +2*a(n-7)
EXAMPLE
Some solutions for n=5
..0..0..1. .0..1..0. .0..1..1. .0..1..0. .0..1..0. .0..1..0. .0..1..1
..1..0..1. .0..0..0. .0..0..0. .0..0..1. .0..0..1. .0..1..1. .0..0..0
..1..1..1. .0..1..0. .0..0..1. .1..0..0. .1..1..1. .1..1..1. .0..0..1
..0..1..0. .1..0..0. .0..1..0. .1..0..0. .1..1..1. .0..1..0. .1..1..0
..1..1..0. .0..1..0. .1..1..1. .0..0..1. .0..0..1. .0..0..0. .0..1..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jul 17 2018
STATUS
approved