OFFSET
1,3
COMMENTS
Column 2 of A279534.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 18*a(n-1) -108*a(n-2) +183*a(n-3) +408*a(n-4) -1332*a(n-5) +69*a(n-6) +2442*a(n-7) -1632*a(n-8) -1043*a(n-9) +1452*a(n-10) -528*a(n-11) +64*a(n-12) for n>13
EXAMPLE
Some solutions for n=4
..0..0. .0..1. .0..0. .0..1. .0..1. .0..1. .0..1. .0..1. .0..1. .0..1
..1..1. .2..1. .1..1. .2..2. .2..2. .0..0. .1..1. .1..1. .2..1. .2..0
..0..1. .1..1. .1..0. .0..2. .2..0. .1..0. .0..2. .2..1. .1..1. .0..0
..2..1. .0..0. .1..0. .0..2. .2..0. .1..2. .0..0. .2..2. .0..2. .0..2
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 14 2016
STATUS
approved