OFFSET
1,2
COMMENTS
Column 3 of A281034.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 6*a(n-1) -11*a(n-2) +4*a(n-3) +19*a(n-4) -46*a(n-5) +23*a(n-6) +4*a(n-7) -59*a(n-8) +26*a(n-9) -37*a(n-10) -20*a(n-11) +4*a(n-12) -36*a(n-13) -8*a(n-15) -8*a(n-16) -4*a(n-18) for n>21
EXAMPLE
Some solutions for n=4
..0..0..0. .0..1..0. .0..0..1. .0..0..1. .0..0..0. .0..1..0. .0..1..0
..0..1..0. .1..1..1. .0..1..1. .1..0..1. .0..1..0. .0..0..0. .0..1..0
..0..1..0. .1..0..0. .1..0..1. .1..1..1. .0..1..1. .1..1..1. .1..0..1
..1..0..1. .1..0..0. .0..1..0. .0..0..1. .1..0..0. .0..0..1. .0..0..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 13 2017
STATUS
approved