OFFSET
0,3
COMMENTS
The weight of a multiset partition is the sum of sizes of its parts. Weight is generally not the same as number of vertices.
EXAMPLE
Non-isomorphic representatives of the a(1) = 1, a(2) = 3, and a(3) = 7 multiset partitions:
1: {{1}}
2: {{1,1}}
{{1},{1}}
{{1},{2}}
3: {{1,1,1}}
{{1},{1,1}}
{{1},{2,2}}
{{2},{1,2}}
{{1},{1},{1}}
{{1},{2},{2}}
{{1},{2},{3}}
CROSSREFS
KEYWORD
nonn,more
AUTHOR
Gus Wiseman, Sep 23 2018
STATUS
approved