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A268254 Number of length-(n+1) 0..n arrays with new repeated values introduced in sequential order starting with zero. 1
3, 17, 143, 1610, 22710, 384605, 7594224, 171161319, 4333369912, 121706300672, 3754131927947, 126136021943207, 4584723067123764, 179223541390399501, 7497293121634632330, 334153612151475666156, 15807274255300507355559 (list; graph; refs; listen; history; text; internal format)
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: A189001 A087885 A178685 * A198860 A298691 A051442

Adjacent sequences:  A268251 A268252 A268253 * A268255 A268256 A268257

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 29 2016

STATUS

approved

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Last modified January 18 01:36 EST 2019. Contains 319260 sequences. (Running on oeis4.)