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A305779
Number of set partitions of [n] with alternating parity of elements and exactly five blocks.
1
1, 5, 19, 62, 204, 627, 2006, 6045, 19091, 56804, 177431, 523072, 1618006, 4739853, 14544372, 42440871, 129419597, 376877914, 1143885829, 3328765378, 10068808024, 29308488795, 88433869354, 257651383313, 776063514999, 2264100874960, 6811218232163, 19903182431380
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OFFSET
5,2
LINKS
Table of n, a(n) for n=5..32.
Wikipedia,
Partition of a set
CROSSREFS
Column k=5 of
A274581
.
Sequence in context:
A173627
A295288
A141397
*
A143131
A036677
A003296
Adjacent sequences:
A305776
A305777
A305778
*
A305780
A305781
A305782
KEYWORD
nonn
AUTHOR
Alois P. Heinz
, Jun 10 2018
STATUS
approved
