OFFSET
1,1
COMMENTS
Row 7 of A275228.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 20*a(n-1) +57*a(n-2) -1206*a(n-3) +3096*a(n-4) +2306*a(n-5) -16957*a(n-6) +20440*a(n-7) -7755*a(n-8) for n>9
EXAMPLE
Some solutions for n=4
..0..1..0..2. .0..1..0..2. .0..0..0..1. .0..1..0..0. .0..1..0..0
..1..0..1..1. .2..0..1..0. .1..2..1..0. .2..2..1..2. .1..2..1..2
..0..2..0..2. .0..1..0..1. .2..1..2..1. .0..1..2..1. .2..1..2..1
..2..0..2..0. .2..0..2..0. .1..2..1..0. .1..0..0..2. .1..2..1..2
..0..2..0..2. .0..2..0..1. .2..1..2..1. .2..1..2..1. .2..1..2..1
..2..0..2..0. .1..0..2..0. .1..2..1..2. .1..2..1..2. .1..2..1..0
..1..2..1..1. .0..1..0..1. .2..1..2..1. .2..1..0..1. .0..0..0..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jul 20 2016
STATUS
approved