OFFSET
1,1
COMMENTS
Column 2 of A207300
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 24*a(n-1) -102*a(n-2) -656*a(n-3) +4911*a(n-4) -9576*a(n-5) +5400*a(n-6) for n>28
EXAMPLE
Some solutions for n=4
..3..3..3....3..0..0....0..2..2....1..1..3....0..0..1....2..3..2....2..1..1
..2..0..0....2..0..1....1..1..0....3..0..0....0..0..3....0..0..0....0..0..0
..3..0..3....0..0..2....1..1..2....0..0..3....3..0..0....3..2..3....3..1..3
..2..1..0....1..0..0....2..3..0....2..0..3....3..0..1....0..0..0....3..1..3
..2..3..3....1..0..2....0..1..1....3..0..1....1..0..3....2..3..0....3..1..3
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Feb 16 2012
STATUS
approved