OFFSET
1,3
COMMENTS
Column 3 of A299521.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 3*a(n-1) +a(n-2) -6*a(n-3) -a(n-4) +2*a(n-6) +4*a(n-7) -a(n-8) +8*a(n-9) -3*a(n-10) -a(n-11) -a(n-12) for n>13
EXAMPLE
Some solutions for n=5
..0..0..1. .0..1..0. .0..0..0. .0..0..0. .0..0..0. .0..0..0. .0..1..0
..0..0..0. .1..1..1. .0..0..0. .0..0..0. .0..0..0. .0..0..0. .1..1..1
..1..0..1. .0..1..0. .0..0..0. .1..0..1. .1..0..1. .0..0..0. .1..1..1
..0..0..0. .1..1..1. .1..1..1. .0..0..0. .0..0..0. .0..0..0. .1..1..1
..0..0..1. .1..1..0. .1..1..1. .1..0..0. .0..0..1. .0..0..0. .0..1..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Feb 11 2018
STATUS
approved