OFFSET
1,3
COMMENTS
Column 3 of A299581.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 2*a(n-1) +a(n-2) +a(n-3) -4*a(n-4) -2*a(n-5) -2*a(n-6) +a(n-9) for n>13
EXAMPLE
Some solutions for n=5
..0..1..1. .0..0..0. .0..0..1. .0..1..1. .0..0..0. .0..0..0. .0..0..1
..1..1..1. .0..0..0. .0..0..0. .1..1..1. .0..0..0. .0..0..0. .0..0..0
..1..1..1. .0..0..0. .0..0..0. .1..1..1. .1..1..1. .1..1..1. .0..0..0
..0..0..0. .0..0..0. .0..0..0. .1..1..1. .1..1..1. .1..1..1. .1..1..1
..0..0..0. .0..0..0. .0..0..0. .1..1..0. .0..1..1. .1..1..1. .1..1..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Feb 13 2018
STATUS
approved