OFFSET
1,1
COMMENTS
Row 6 of A199530.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..200
FORMULA
Empirical: a(n) = (88/5)*n^5 + 44*n^4 + (58/3)*n^3 - 3*n^2 + (31/15)*n.
Conjectures from Colin Barker, May 15 2018: (Start)
G.f.: 2*x*(40 + 467*x + 529*x^2 + 21*x^3 - x^4) / (1 - x)^6.
a(n) = 6*a(n-1) - 15*a(n-2) + 20*a(n-3) - 15*a(n-4) + 6*a(n-5) - a(n-6) for n>6.
(End)
EXAMPLE
Some solutions for n=5:
..1....5...-4....0....5...-3...-1...-3....5....5...-5....0...-3....3....3....4
..3....1....2....5....5...-1....2...-4....4...-3...-2...-3....4....3....1...-1
..3...-5...-3...-3....1...-1....5....1...-5....3....3....4...-3...-1....3....1
.-1....0....4...-2...-3...-4...-3...-2....0....0....5....0...-1...-5....0....0
.-2...-3....4...-4...-3....4...-2....3...-5...-5....2...-3...-1....2...-2...-2
.-4....2...-3....4...-5....5...-1....5....1....0...-3....2....4...-2...-5...-2
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 07 2011
STATUS
approved