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