A199846 Number of -7..7 arrays x(0..n-1) of n elements with zero sum and no element more than one greater than the previous.

1, 8, 41, 206, 944, 4188, 17879, 74424, 303400, 1218440, 4833416, 18992142, 74057460, 287035502, 1107086841, 4253339267, 16289667330, 62230152461, 237255014892, 903101912666, 3433312226666, 13039708953325, 49488269035164

Offset: 1

Author

R. H. Hardin Nov 11 2011

Keywords

• nonn

Comments

Column 7 of A199847

Examples

			Some solutions for n=6
..4....4....6....7....6....4....3....4....4....6....6...-1....4....6....4....6
..2....4....2...-2....4....4....3....4....5....2....7....0....4....5....5....6
..1....0....2...-2....0...-2....2....1....4....2...-1....1....4....2....6...-1
.-1...-1...-3...-2...-1...-1...-1...-3...-1...-4...-1....2....1...-5...-4...-2
..0...-4...-2...-1...-4....0...-1...-2...-5...-3...-5....0...-7...-4...-6...-4
.-6...-3...-5....0...-5...-5...-6...-4...-7...-3...-6...-2...-6...-4...-5...-5
		

Links

• R. H. Hardin, Table of n, a(n) for n = 1..146