OFFSET
1,1
COMMENTS
Row 3 of A199832
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..200
FORMULA
Empirical: a(n) = (115/12)*n^4 - (29/6)*n^3 + (5/12)*n^2 - (7/6)*n.
Empirical: G.f.: -2*x*(2+47*x+58*x^2+8*x^3) / (x-1)^5. - R. J. Mathar, Aug 01 2014
EXAMPLE
Some solutions for n=3
..3....3....0....2....1....1....2...-1...-3...-2....0....0...-1...-1....2...-1
..2...-1...-3....1...-2....2....1....3...-3....0....3...-2...-2...-3...-1...-1
.-3....0....0....1....0...-1....0....0....1....3...-2....0....1...-2...-2...-3
..1...-1....1...-2...-1...-3...-2...-3....3....0....1....3....2....3....1....2
.-3...-1....2...-2....2....1...-1....1....2...-1...-2...-1....0....3....0....3
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin Nov 11 2011
STATUS
approved