OFFSET
1,1
COMMENTS
Column 4 of A275090.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 3*a(n-1) +8*a(n-2) +46*a(n-3) +133*a(n-4) -64*a(n-5) -492*a(n-6) -520*a(n-7) +568*a(n-8) -1592*a(n-9) +1156*a(n-10) +1328*a(n-11) -4992*a(n-12) +1440*a(n-13) +3456*a(n-14) for n>15
EXAMPLE
Some solutions for n=4
..0..0..1..2. .0..0..1..2. .0..1..1..2. .0..1..1..0. .0..0..1..1
..0..0..1..1. .0..2..1..1. .0..1..1..0. .0..1..1..2. .1..0..2..1
..0..1..2..2. .0..1..1..0. .1..1..2..2. .1..1..2..2. .1..1..2..2
..0..1..1..0. .2..1..1..0. .2..2..0..0. .1..1..2..0. .0..2..2..0
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jul 16 2016
STATUS
approved