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A305780 Number of set partitions of [n] with alternating parity of elements and exactly six blocks. 1
1, 6, 27, 108, 409, 1558, 5692, 21328, 76468, 282885, 999383, 3656887, 12772925, 46306978, 160408850, 577077226, 1987559778, 7105490315, 24379316121, 86719101209, 296819500851, 1051663900480, 3594472289644, 12696988924724, 43364647235536, 152825304753761 (list; graph; refs; listen; history; text; internal format)
OFFSET

6,2

LINKS

Table of n, a(n) for n=6..31.

Wikipedia, Partition of a set

CROSSREFS

Column k=6 of A274581.

Sequence in context: A119852 A220529 A027471 * A037695 A318638 A094829

Adjacent sequences:  A305777 A305778 A305779 * A305781 A305782 A305783

KEYWORD

nonn

AUTHOR

Alois P. Heinz, Jun 10 2018

STATUS

approved

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Last modified August 4 20:28 EDT 2021. Contains 346455 sequences. (Running on oeis4.)