OFFSET
1,1
COMMENTS
Column 5 of A280859.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = a(n-1) +a(n-2) -a(n-3) +2*a(n-4) -a(n-5) +4*a(n-6) -a(n-7) -a(n-8) -2*a(n-9) -3*a(n-12) for n>18
EXAMPLE
Some solutions for n=4
..0..0..1..1..0. .0..1..1..2..1. .0..1..0..1..1. .0..1..0..0..1
..1..2..2..0..2. .2..2..0..0..1. .0..2..0..2..0. .2..1..2..1..2
..1..0..1..1..2. .0..1..1..2..2. .1..2..1..1..0. .0..0..2..0..2
..0..2..2..0..0. .2..2..0..0..1. .1..0..0..2..2. .2..1..1..0..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 09 2017
STATUS
approved