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A280886 Number of set partitions of [n] into exactly eight blocks where sizes of distinct blocks are coprime. 1
1, 36, 120, 4950, 792, 97812, 171600, 8384805, 972400, 233084280, 14734512, 2345611788, 5678805120, 343522980720, 1221436128, 13374187844391, 185339038104, 22390031621100, 18903665638000, 5148292859617050, 118997530835040, 97446697480400580, 78169931776006200 (list; graph; refs; listen; history; text; internal format)
OFFSET

8,2

LINKS

Table of n, a(n) for n=8..30.

Wikipedia, Coprime integers

Wikipedia, Partition of a set

CROSSREFS

Column k=8 of A280880.

Sequence in context: A254146 A173420 A271736 * A278022 A333007 A016862

Adjacent sequences:  A280883 A280884 A280885 * A280887 A280888 A280889

KEYWORD

nonn

AUTHOR

Alois P. Heinz, Jan 09 2017

STATUS

approved

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Last modified July 28 11:09 EDT 2021. Contains 346326 sequences. (Running on oeis4.)