OFFSET
0,3
REFERENCES
E. Palmer and F. Harary, Graphical Enumeration, Academic Press, 1973.
LINKS
Bob Lucassen, Marko Riedel, Counting sets of unlabeled sequences of total cardinality n
CROSSREFS
KEYWORD
nonn,more
AUTHOR
Marko Riedel, Mar 11 2017
STATUS
approved