A202663 Number of -7..7 arrays of n elements with first through fourth differences also in -7..7.

15, 169, 1483, 9739, 47713, 238453, 1186107, 5914721, 29498237, 147102833, 733637717, 3658966867, 18248551605, 91011704581, 453908063159, 2263802495143, 11290385910711, 56309167233261, 280833879734153, 1400618531203889

Offset

1,1

Comments

Column 7 of A202664.

Links

R. H. Hardin, Table of n, a(n) for n = 1..210

Example

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

Crossrefs

Cf. A202664.

Sequence in context: A121114 A121116 A218928 * A202123 A201087 A138973

Adjacent sequences: A202660 A202661 A202662 * A202664 A202665 A202666

Keyword

nonn

Author

R. H. Hardin, Dec 22 2011

Status

approved