OFFSET
1,2
COMMENTS
Column 3 of A280217.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 9*a(n-1) -12*a(n-2) -96*a(n-3) +273*a(n-4) +165*a(n-5) -1237*a(n-6) +1107*a(n-7) +1053*a(n-8) -3215*a(n-9) +2415*a(n-10) +219*a(n-11) -622*a(n-12) -600*a(n-13) +1371*a(n-14) -349*a(n-15) -468*a(n-16) -108*a(n-17) +80*a(n-18) -240*a(n-19) -192*a(n-20) -64*a(n-21) for n>28
EXAMPLE
Some solutions for n=4
..0..1..1. .0..0..1. .0..1..2. .0..0..0. .0..1..2. .0..1..1. .0..1..2
..0..1..0. .0..0..1. .0..2..2. .0..0..1. .1..2..2. .1..1..2. .1..1..2
..0..0..0. .0..1..1. .0..0..2. .0..2..0. .1..2..2. .2..2..1. .1..1..2
..0..0..1. .1..1..2. .0..0..2. .0..0..0. .1..1..1. .2..1..1. .1..1..2
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 29 2016
STATUS
approved