A200452 Number of -6..6 arrays x(0..n+1) of n+2 elements with zero sum and nonzero first and second differences.

102, 1148, 12002, 127988, 1375006, 14923636, 163058296, 1791564880, 19771609900, 219008350922, 2433568582846, 27114470656254, 302815705130546, 3388823734521446, 37993433832232370, 426648365048068166

Offset: 1

Author

R. H. Hardin Nov 18 2011

Keywords

• nonn

Comments

Column 6 of A200454

Examples

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

Links

• R. H. Hardin, Table of n, a(n) for n = 1..119