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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
OFFSET
6,2
CROSSREFS
Column k=6 of A274581.
Sequence in context: A119852 A220529 A027471 * A037695 A318638 A094829
KEYWORD
nonn
AUTHOR
Alois P. Heinz, Jun 10 2018
STATUS
approved