OFFSET
1,2
COMMENTS
Column 3 of A298719.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 3*a(n-1) +4*a(n-2) +3*a(n-3) -2*a(n-4) -18*a(n-5) -29*a(n-6) -32*a(n-7) +74*a(n-8) +74*a(n-9) -90*a(n-10) -73*a(n-11) +33*a(n-12) -21*a(n-13) -29*a(n-14) +32*a(n-15) +4*a(n-16) +4*a(n-17) +8*a(n-18)
EXAMPLE
Some solutions for n=7
..0..0..1. .0..0..1. .0..1..1. .0..0..0. .0..0..0. .0..0..0. .0..0..0
..0..1..1. .0..1..1. .0..0..1. .1..0..0. .0..1..0. .1..0..1. .1..0..1
..0..0..0. .0..0..0. .1..1..1. .1..1..1. .1..1..1. .1..1..1. .1..1..1
..0..0..0. .0..0..0. .1..1..1. .1..1..1. .1..1..1. .1..1..1. .1..1..1
..0..1..0. .0..1..0. .1..0..1. .1..0..1. .1..0..1. .1..0..0. .0..0..1
..1..0..1. .1..1..0. .1..0..0. .1..0..0. .1..0..0. .0..0..1. .0..1..1
..1..1..1. .1..0..0. .1..1..0. .1..1..0. .1..1..0. .0..1..1. .0..0..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 25 2018
STATUS
approved