Number of set partitions of {1,...,3n} into sets of size at most 3.
A229414
Number of set partitions of {1,...,3n} into sets of size at most 3.
Terms
- a(0) =1a(1) =5a(2) =166a(3) =12644a(4) =1680592a(5) =341185496a(6) =97620050080
External references
- oeis: A229414