OFFSET
1,1
COMMENTS
Column 3 of A317160.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 3*a(n-1) +a(n-2) +9*a(n-3) -24*a(n-4) -25*a(n-5) +9*a(n-6) -3*a(n-7) +49*a(n-8) +17*a(n-9) +122*a(n-10) +28*a(n-11) -244*a(n-12) -106*a(n-13) +175*a(n-14) +40*a(n-15) -48*a(n-16) -2*a(n-17) +4*a(n-18) for n>20
EXAMPLE
Some solutions for n=5
..0..0..1. .0..0..1. .0..1..0. .0..0..0. .0..0..0. .0..1..1. .0..0..0
..0..0..0. .0..0..0. .0..0..0. .0..0..0. .0..0..0. .1..1..1. .0..1..0
..0..0..0. .0..1..1. .0..0..0. .0..0..0. .0..0..0. .1..1..1. .0..0..0
..0..0..1. .0..0..0. .0..0..0. .0..0..0. .1..0..0. .1..1..1. .0..0..0
..0..0..0. .0..0..1. .1..0..0. .0..1..0. .0..0..0. .1..0..1. .0..1..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jul 22 2018
STATUS
approved