OFFSET
1,2
COMMENTS
Column 6 of A193648
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..200
FORMULA
Empirical: a(n) = 2*a(n-1) +10*a(n-2) +a(n-3).
Empirical: G.f.: -x*(1+11*x+x^2) / ( -1+2*x+10*x^2+x^3 ). - R. J. Mathar, Feb 19 2015
EXAMPLE
Some solutions for n=6
..2...-4...-1...-5....1....5....6....0....1....0....6....0....0...-1....0...-2
.-2....4....1....5...-1...-5...-6....0...-1....3...-6....6....3....1....1....2
.-2...-4...-3....2....0....5....0....0....0...-3....2...-6...-3...-3...-1....2
..2....1....3...-2....0....0...-3....2...-3....3...-2....2...-2....3....3...-2
.-5...-1...-5....1....6....4....3...-2....3....6....0...-2....2....5...-3...-3
..5....0....5...-1...-6...-4....0....0...-3...-6....0....2...-2...-5....3....3
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Aug 02 2011
STATUS
approved