A250278 Number of length 3+1 0..n arrays with the sum of the squares of adjacent differences multiplied by some arrangement of +-1 equal to zero

8, 27, 52, 89, 140, 207, 288, 389, 504, 639, 780, 949, 1132, 1335, 1552, 1789, 2048, 2339, 2636, 2957, 3292, 3639, 4000, 4401, 4840, 5299, 5772, 6265, 6772, 7319, 7880, 8477, 9080, 9711, 10364, 11061, 11772, 12495, 13232, 14013, 14816, 15647, 16484

Offset

1,1

Comments

Row 3 of A250277

Links

R. H. Hardin, Table of n, a(n) for n = 1..201

Example

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

Crossrefs

Sequence in context: A063144 A122013 A250230 * A223950 A339897 A131620

Adjacent sequences: A250275 A250276 A250277 * A250279 A250280 A250281

Keyword

nonn

Author

R. H. Hardin, Nov 16 2014

Status

approved