OFFSET
1,1
COMMENTS
Column 4 of A203796
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 49*a(n-1) +543*a(n-2) -15435*a(n-3) +26244*a(n-4) +117288*a(n-5) -79704*a(n-6) -46656*a(n-7)
EXAMPLE
Some solutions for n=4
..3..2..2..1..1....1..0..0..0..0....1..1..3..2..0....3..2..3..0..0
..3..3..2..2..1....3..1..0..1..0....3..1..1..3..2....1..3..3..3..0
..3..3..3..2..2....1..3..1..3..1....2..3..1..1..3....0..1..3..0..1
..2..3..1..3..2....1..1..3..0..3....1..2..3..1..1....2..0..1..3..0
..0..2..3..1..3....0..1..1..3..0....0..1..2..3..1....3..2..0..1..3
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 05 2012
STATUS
approved