OFFSET
1,1
COMMENTS
Column 3 of A300089.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 2*a(n-1) +a(n-2) +2*a(n-3) -10*a(n-4) +2*a(n-5) +2*a(n-6) +2*a(n-7) -3*a(n-8) -3*a(n-9) +12*a(n-10) -4*a(n-11) +17*a(n-12) -3*a(n-13) -5*a(n-14) +a(n-15) -12*a(n-16) -6*a(n-17) -2*a(n-18) -3*a(n-19) -a(n-20) for n>21
EXAMPLE
Some solutions for n=5
..0..0..1. .0..1..1. .0..0..0. .0..1..1. .0..0..0. .0..0..1. .0..1..0
..0..0..1. .0..1..1. .0..0..0. .0..1..1. .0..0..0. .0..0..1. .0..1..0
..0..0..0. .0..0..0. .0..0..0. .1..1..1. .0..0..0. .0..0..0. .0..0..0
..1..1..0. .1..0..0. .0..0..0. .0..1..1. .1..1..1. .0..0..1. .0..1..0
..1..1..0. .1..0..0. .0..0..0. .0..1..1. .1..1..1. .0..0..1. .0..1..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Feb 24 2018
STATUS
approved