OFFSET
1,2
COMMENTS
Column 3 of A298895.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 4*a(n-1) -a(n-2) -5*a(n-3) -10*a(n-4) +11*a(n-5) +15*a(n-6) +2*a(n-7) -5*a(n-8) -33*a(n-9) -20*a(n-10) +47*a(n-11) +36*a(n-12) +4*a(n-14) -12*a(n-15) -2*a(n-16) +2*a(n-17) for n>18
EXAMPLE
Some solutions for n=7
..0..0..0. .0..0..1. .0..0..0. .0..0..0. .0..1..1. .0..0..0. .0..1..1
..0..0..0. .0..1..1. .0..0..0. .0..0..0. .0..0..1. .1..0..1. .0..0..1
..1..1..1. .1..0..0. .0..0..0. .1..1..1. .1..0..1. .1..1..1. .1..0..1
..0..1..0. .1..0..1. .0..0..0. .1..1..1. .1..1..0. .0..0..1. .1..1..0
..0..0..0. .1..1..1. .1..1..1. .0..0..0. .1..0..1. .0..1..0. .0..0..0
..0..1..0. .1..0..1. .1..1..1. .0..0..0. .0..0..1. .1..1..0. .0..1..0
..1..1..1. .0..0..0. .1..1..1. .0..0..0. .0..1..1. .1..0..0. .1..1..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 28 2018
STATUS
approved