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A287256 Number of set partitions of [n] such that all absolute differences between least elements of consecutive blocks are <= six. 4
1, 1, 2, 5, 15, 52, 203, 877, 4139, 21079, 114784, 664100, 4062241, 26164323, 176828713, 1250185783, 9221588229, 70796614497, 564525137134, 4666694339977, 39927027760582, 353023213637306, 3221255985418911, 30296436876469140, 293363448567612910 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

LINKS

Alois P. Heinz, Table of n, a(n) for n = 0..581

Wikipedia, Partition of a set

FORMULA

a(n) = A287216(n,6).

a(n) = A000110(n) for n <= 7.

CROSSREFS

Column k=6 of A287216.

Cf. A000110.

Sequence in context: A276723 A287585 A287278 * A287668 A099262 A141081

Adjacent sequences:  A287253 A287254 A287255 * A287257 A287258 A287259

KEYWORD

nonn

AUTHOR

Alois P. Heinz, May 22 2017

STATUS

approved

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Last modified August 3 15:40 EDT 2020. Contains 336200 sequences. (Running on oeis4.)