A250279 Number of length 4+1 0..n arrays with the sum of the squares of adjacent differences multiplied by some arrangement of +-1 equal to zero.

16, 79, 240, 581, 1132, 1991, 3156, 4841, 7024, 9807, 13180, 17561, 22788, 28943, 36012, 44421, 53964, 65179, 77596, 91809, 107508, 124907, 143800, 165353, 188792, 214495, 242152, 272493, 305164, 341051, 379132, 420569, 464568, 511663, 561324

Offset: 1

Author

R. H. Hardin, Nov 16 2014

Keywords

• nonn

Comments

Row 4 of A250277

Examples

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

Links

• R. H. Hardin, Table of n, a(n) for n = 1..68