A268254 Number of length-(n+1) 0..n arrays with new repeated values introduced in sequential order starting with zero.

3, 17, 143, 1610, 22710, 384605, 7594224, 171161319, 4333369912, 121706300672, 3754131927947, 126136021943207, 4584723067123764, 179223541390399501, 7497293121634632330, 334153612151475666156, 15807274255300507355559

Offset

1,1

Comments

Diagonal of A268261.

Links

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

Example

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

Crossrefs

Cf. A268261.

Sequence in context: A087885 A178685 A361767 * A333331 A198860 A298691

Adjacent sequences: A268251 A268252 A268253 * A268255 A268256 A268257

Keyword

nonn

Author

R. H. Hardin, Jan 29 2016

Status

approved