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A280887 Number of set partitions of [n] into exactly nine blocks where sizes of distinct blocks are coprime. 1
1, 45, 165, 8415, 1287, 195195, 366795, 22046310, 2358070, 693870606, 39982878, 7765924530, 19829897010, 1474459789770, 4013220090, 63387586762335, 769009559175, 106739428871075, 85029993637875, 28720696235896665, 574973722599705, 581923529546044725 (list; graph; refs; listen; history; text; internal format)
OFFSET

9,2

LINKS

Table of n, a(n) for n=9..30.

Wikipedia, Coprime integers

Wikipedia, Partition of a set

CROSSREFS

Column k=9 of A280880.

Sequence in context: A061658 A254147 A271737 * A158630 A158634 A091197

Adjacent sequences:  A280884 A280885 A280886 * A280888 A280889 A280890

KEYWORD

nonn

AUTHOR

Alois P. Heinz, Jan 09 2017

STATUS

approved

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Last modified September 24 01:21 EDT 2020. Contains 337315 sequences. (Running on oeis4.)