OFFSET
0,6
COMMENTS
A generalization of ordinary Stirling set numbers to multisets that contain some m instances each of n elements, here we have m=3.
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.
EXAMPLE
The triangular array starts:
[0]: 1,
[1]: 1, 1, 1;
[2]: 1, 7, 11, 8, 3, 1;
[3]: 1, 31, 139, 219, 175, 86, 28, 6, 1;
[4]: 1, 127, 1547, 5321, 8004, 6687, 3579, 1329, 359, 71, 10, 1;
CROSSREFS
KEYWORD
nonn,tabf
AUTHOR
Marko Riedel, Nov 28 2022
STATUS
approved