A250563 Number of length 4+2 0..n arrays with the sum of second differences multiplied by some arrangement of +-1 equal to zero

32, 297, 1516, 5105, 13732, 31173, 63400, 117749, 204712, 336293, 529072, 800689, 1175088, 1677185, 2338728, 3193293, 4283108, 5649837, 7347520, 9429021, 11959288, 15003857, 18642524, 22951429, 28026324, 33959013, 40858932, 48834549

Offset

1,1

Comments

Row 4 of A250561

Links

R. H. Hardin, Table of n, a(n) for n = 1..75

Example

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

Crossrefs

Sequence in context: A316287 A306051 A317228 * A060158 A074469 A159654

Adjacent sequences: A250560 A250561 A250562 * A250564 A250565 A250566

Keyword

nonn

Author

R. H. Hardin, Nov 25 2014

Status

approved