Number of multisets of nonempty words with a total of n letters over n-ary alphabet such that if a letter occurs in the multiset all predecessors occur at least once.
A257741
Number of multisets of nonempty words with a total of n letters over n-ary alphabet such that if a letter occurs in the multiset all predecessors occur at least once.
Terms
- a(0) =1a(1) =1a(2) =5a(3) =30a(4) =241a(5) =2356a(6) =27315a(7) =364319a(8) =5488468a(9) =92040141a(10) =1698933390a(11) =34206221161a(12) =745622368096
External references
- oeis: A257741