OFFSET
1,3
COMMENTS
Column 3 of A317896.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 4*a(n-1) +8*a(n-3) -10*a(n-4) +3*a(n-5) -17*a(n-6) -7*a(n-7) -21*a(n-8) +6*a(n-9) +10*a(n-10) +4*a(n-11) -18*a(n-12) -21*a(n-13) -9*a(n-14) -a(n-15) +2*a(n-16) for n>18
EXAMPLE
Some solutions for n=5
..0..1..0. .0..1..1. .0..1..0. .0..1..1. .0..1..0. .0..1..0. .0..1..0
..1..0..1. .1..0..0. .1..1..0. .1..0..0. .1..1..0. .1..1..0. .1..0..1
..0..1..0. .0..1..0. .0..1..0. .0..1..1. .0..0..1. .0..0..1. .1..0..0
..1..1..1. .1..1..1. .0..1..1. .0..1..0. .1..0..1. .0..1..0. .0..0..1
..0..1..0. .0..1..0. .0..1..0. .1..0..1. .0..1..0. .1..0..1. .1..1..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Aug 10 2018
STATUS
approved