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A280884
Number of set partitions of [n] into exactly six blocks where sizes of distinct blocks are coprime.
1
1, 21, 56, 1386, 252, 18942, 28512, 837837, 122122, 17600583, 1445808, 140411908, 301302288, 10781435088, 79318464, 333208994139, 6813685494, 597189699029, 582524800704, 89346032143830, 3151550453480, 1467268659100530, 1095411461933880, 45383787697612455
OFFSET
6,2
CROSSREFS
Column k=6 of A280880.
Sequence in context: A271734 A189004 A183310 * A257103 A146560 A174969
KEYWORD
nonn
AUTHOR
Alois P. Heinz, Jan 09 2017
STATUS
approved