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A319789 Number of intersecting multiset partitions of strongly normal multisets of size n. 8
1, 1, 3, 6, 17, 40, 122, 330, 1032 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,3
COMMENTS
A multiset is normal if it spans an initial interval of positive integers, and strongly normal if in addition its multiplicities are weakly decreasing. A multiset partition is intersecting iff no two parts are disjoint.
LINKS
EXAMPLE
The a(1) = 1 through a(3) = 6 multiset partitions:
1: {{1}}
2: {{1,1}}
{{1,2}}
{{1},{1}}
3: {{1,1,1}}
{{1,1,2}}
{{1,2,3}}
{{1},{1,1}}
{{1},{1,2}}
{{1},{1},{1}}
CROSSREFS
Sequence in context: A027415 A280088 A151503 * A007718 A297972 A275057
KEYWORD
nonn,more
AUTHOR
Gus Wiseman, Sep 27 2018
STATUS
approved

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Last modified May 24 18:59 EDT 2024. Contains 372781 sequences. (Running on oeis4.)