OFFSET
0,2
COMMENTS
Generalization of Bell numbers to multiset partitions with m instances each of n different elements, here m=4.
REFERENCES
F. Harary and E. Palmer, Graphical Enumeration, Academic Press, 1973.
LINKS
Marko Riedel et al., Number of ways to partition a multiset into k non-empty multisets, Mathematics Stack Exchange.
CROSSREFS
KEYWORD
nonn
AUTHOR
Marko Riedel, Nov 29 2022
STATUS
approved