OFFSET
1,2
COMMENTS
Column 3 of A298070.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 4*a(n-1) +a(n-3) -2*a(n-4) -9*a(n-5) -43*a(n-6) +8*a(n-7) +97*a(n-8) +27*a(n-9) -91*a(n-10) -37*a(n-11) +15*a(n-12) -14*a(n-13) +18*a(n-14) +10*a(n-15) -a(n-16) +2*a(n-17)
EXAMPLE
Some solutions for n=7
..0..0..0. .0..0..0. .0..0..1. .0..0..0. .0..1..1. .0..1..1. .0..1..1
..0..1..0. .0..1..0. .0..1..1. .0..1..0. .0..0..1. .0..0..1. .0..0..1
..1..1..1. .0..1..1. .1..0..0. .0..1..1. .0..1..1. .1..0..0. .0..1..1
..0..0..1. .0..1..1. .1..0..0. .0..1..0. .0..0..1. .1..1..1. .1..0..1
..0..0..1. .0..0..0. .1..1..0. .0..0..0. .0..1..1. .1..1..1. .1..0..0
..1..1..0. .1..0..1. .1..0..0. .0..1..0. .0..1..0. .1..0..0. .1..0..0
..1..0..0. .1..1..1. .1..1..0. .1..1..1. .0..0..0. .1..1..0. .1..1..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 11 2018
STATUS
approved