OFFSET
1,2
COMMENTS
Column 3 of A206503
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..62
FORMULA
Empirical: a(n) = 55*a(n-1) +370*a(n-2) -8556*a(n-3) +15608*a(n-4) +70028*a(n-5) -175808*a(n-6) +98304*a(n-7) for n>9
EXAMPLE
Some solutions for n=4
..0..1..2....0..1..2....0..1..2....0..1..2....0..1..2....0..1..2....0..1..2
..2..3..0....2..3..0....2..3..0....3..4..0....2..3..4....2..3..4....2..3..4
..1..4..5....4..5..1....1..4..5....2..5..1....1..0..5....1..5..6....4..5..1
..5..0..1....1..0..4....5..2..1....0..3..6....3..4..2....3..4..7....6..2..3
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Feb 08 2012
STATUS
approved