OFFSET
1,2
COMMENTS
Column 3 of A304019.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 2*a(n-1) +4*a(n-2) +3*a(n-3) -13*a(n-4) -20*a(n-5) +6*a(n-6) -21*a(n-7) +23*a(n-8) +63*a(n-9) +36*a(n-10) +14*a(n-11) -55*a(n-12) -43*a(n-13) -7*a(n-14) +26*a(n-15) +25*a(n-16) -6*a(n-17) +4*a(n-18) -4*a(n-20)
EXAMPLE
Some solutions for n=5
..0..1..0. .0..0..1. .0..0..0. .0..0..1. .0..0..1. .0..0..1. .0..1..1
..1..1..0. .0..1..0. .0..1..1. .0..1..1. .0..1..1. .0..1..1. .1..1..0
..0..0..1. .1..1..0. .1..1..0. .0..1..0. .1..1..1. .0..0..1. .0..0..0
..0..1..1. .0..0..1. .1..1..1. .1..0..0. .1..1..0. .1..1..0. .0..0..0
..0..0..1. .1..0..1. .1..0..1. .1..1..1. .0..1..1. .0..1..0. .1..1..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, May 04 2018
STATUS
approved