OFFSET
1,1
COMMENTS
Column 4 of A280069.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 4*a(n-1) +4*a(n-2) -21*a(n-3) -4*a(n-4) +34*a(n-5) +25*a(n-6) -37*a(n-7) -82*a(n-8) +44*a(n-9) +36*a(n-10) +6*a(n-11) -a(n-12) -5*a(n-13) -3*a(n-14) +a(n-15) for n>18
EXAMPLE
Some solutions for n=4
..0..0..0..0. .0..0..0..0. .0..0..0..0. .0..0..1..1. .0..0..0..0
..0..0..0..1. .0..0..0..1. .0..0..0..1. .0..0..1..1. .0..0..0..1
..0..1..1..1. .1..1..1..1. .0..0..1..1. .0..1..1..1. .0..0..1..1
..1..1..1..1. .1..1..1..1. .0..1..1..1. .1..1..1..1. .0..0..1..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 25 2016
STATUS
approved