OFFSET
1,1
COMMENTS
Column 4 of A206692
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 8*a(n-1) -8*a(n-2) -48*a(n-3) +48*a(n-4) +140*a(n-5) +67*a(n-6) -968*a(n-7) +1564*a(n-8) -586*a(n-9) -1008*a(n-10) -32*a(n-11) +1304*a(n-12) +80*a(n-13) -512*a(n-14) for n>15
EXAMPLE
Some solutions for n=4
..0..1..2..3....0..1..2..3....0..1..2..3....0..1..2..3....0..1..2..3
..2..3..0..2....3..0..1..2....1..0..3..1....2..3..1..0....2..3..0..1
..3..2..1..0....1..2..3..1....2..3..1..0....3..2..0..1....1..0..3..2
..0..1..2..3....0..1..2..0....3..1..0..2....0..1..2..3....0..1..2..3
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Feb 11 2012
STATUS
approved