A199829 Number of -5..5 arrays x(0..n+1) of n+2 elements with zero sum and no two neighbors summing to zero.

70, 660, 5390, 49302, 462234, 4340094, 41008804, 389832124, 3723199342, 35697026718, 343371074564, 3312138136660, 32026131818486, 310327172410762, 3012628449222084, 29294846427926718, 285286085845772334

Offset: 1

Author

R. H. Hardin Nov 11 2011

Keywords

• nonn

Comments

Column 5 of A199832

Examples

			Some solutions for n=3
..2....2....0....0...-5...-3....3...-4...-3...-2....2....1....5....2...-4....0
.-5....4...-4...-4....1...-3...-5....2....4...-5...-5....1...-3...-3....0....4
..4...-1....3...-2....3...-4...-3....5....3...-2....4...-4....5...-5....5....4
.-2...-4....0....4...-1....5....0...-4....1....4....0....5...-4....3...-1...-3
..1...-1....1....2....2....5....5....1...-5....5...-1...-3...-3....3....0...-5
		

Links

• R. H. Hardin, Table of n, a(n) for n = 1..200