A205339 Number of length n+1 nonnegative integer arrays starting and ending with 0 with adjacent elements unequal but differing by no more than 6

0, 6, 30, 277, 2370, 22297, 214724, 2133784, 21632020, 223143400, 2333651994, 24689732388, 263770658256, 2841616524516, 30835061022020, 336721385300276, 3697585562072924, 40805356360923728, 452314009660461816

Offset

1,2

Comments

Column 6 of A205341

Links

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

Example

Some solutions for n=5
..0....0....0....0....0....0....0....0....0....0....0....0....0....0....0....0
..3....1....5....3....6....2....5....2....3....5....5....3....3....3....3....5
..1....3....4....1....4....5....8....4....5....2....9....2....0....7....1....4
..5....9....8....0....2....0....7....3....0....3....8....7....6...10....4....9
..2....6....5....2....3....4....6....5....2....5....4....5....1....5....5....5
..0....0....0....0....0....0....0....0....0....0....0....0....0....0....0....0

Crossrefs

Sequence in context: A051821 A099031 A066108 * A215288 A295611 A264641

Adjacent sequences: A205336 A205337 A205338 * A205340 A205341 A205342

Keyword

nonn

Author

R. H. Hardin Jan 26 2012

Status

approved