A211848 Number of nonnegative integer arrays of length n+15 with new values 0 upwards introduced in order, no three adjacent elements all unequal, and containing the value 8

1, 17, 190, 1672, 12671, 86275, 542235, 3200979, 17970009, 96806505, 503889439, 2547775803, 12567000344, 60679921204, 287630757639, 1341627687593, 6170270168142, 28028072584878, 125932459466866, 560392344329658

Offset

1,2

Comments

Column 7 of A211849

Links

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

Example

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

Crossrefs

Sequence in context: A025931 A115234 A197370 * A021754 A141993 A025467

Adjacent sequences: A211845 A211846 A211847 * A211849 A211850 A211851

Keyword

nonn

Author

R. H. Hardin Apr 22 2012

Status

approved