OFFSET
1,1
COMMENTS
Column 3 of A295253.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 4*a(n-1) +6*a(n-2) +a(n-3) +2*a(n-4) -6*a(n-5) -6*a(n-6) -18*a(n-7) -5*a(n-8) +3*a(n-9) +4*a(n-11) +a(n-12) +9*a(n-13) -a(n-14) +3*a(n-15) -3*a(n-16) -a(n-18)
EXAMPLE
Some solutions for n=7
..1..0..1. .1..0..1. .0..0..0. .1..0..0. .0..0..0. .0..0..0. .1..0..0
..0..0..0. .0..1..0. .1..1..0. .0..1..0. .0..0..0. .0..0..0. .0..0..0
..0..0..1. .0..0..0. .0..0..1. .0..0..0. .1..0..0. .0..0..0. .0..1..1
..0..1..0. .0..1..0. .0..0..0. .1..0..0. .1..0..0. .1..0..0. .0..0..0
..1..0..1. .1..0..0. .1..0..1. .0..0..1. .0..0..0. .0..1..1. .1..0..0
..0..1..0. .0..0..1. .0..1..0. .1..0..1. .0..1..1. .0..0..0. .0..1..0
..1..1..1. .0..1..0. .0..0..1. .0..1..0. .0..0..0. .1..1..0. .1..0..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 18 2017
STATUS
approved