Number of "sets of lists": number of partitions of {1,...,n} into any number of lists, where a list means an ordered subset.

A000262

Number of "sets of lists": number of partitions of {1,...,n} into any number of lists, where a list means an ordered subset.

Terms

    a(0) =1a(1) =1a(2) =3a(3) =13a(4) =73a(5) =501a(6) =4051a(7) =37633a(8) =394353a(9) =4596553a(10) =58941091a(11) =824073141a(12) =12470162233a(13) =202976401213

External references