A267464 Number of length-n 0..n arrays with no following elements larger than the first repeated value.

2, 9, 58, 515, 5921, 83972, 1418740, 27838701, 622347697, 15615978774, 434592601906, 13284763035843, 442468160695185, 15948347001674856, 618492693332510536, 25678060436644303705, 1136319246969590031009

Offset

1,1

Comments

Diagonal of A267471.

Links

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

Example

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

Crossrefs

Cf. A267471.

Sequence in context: A156129 A191811 A005364 * A184355 A346519 A151616

Adjacent sequences: A267461 A267462 A267463 * A267465 A267466 A267467

Keyword

nonn

Author

R. H. Hardin, Jan 15 2016

Status

approved