OFFSET
1,1
COMMENTS
Column 3 of A304926.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = a(n-1) +2*a(n-2) +4*a(n-3) +2*a(n-4) -2*a(n-5) -7*a(n-6) -6*a(n-7) for n>9
EXAMPLE
Some solutions for n=5
..0..1..0. .0..0..0. .0..0..0. .0..1..0. .0..0..1. .0..1..0. .0..1..1
..0..0..0. .0..0..0. .0..1..0. .0..0..0. .0..1..0. .0..0..0. .1..0..1
..0..0..0. .0..0..1. .0..1..0. .0..1..0. .0..0..0. .0..0..1. .1..1..1
..0..0..1. .1..0..0. .0..0..0. .0..1..0. .0..0..0. .0..0..0. .1..1..1
..0..0..0. .0..0..0. .0..0..0. .0..0..0. .0..0..0. .0..1..0. .1..1..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, May 21 2018
STATUS
approved