Number of multisets of nonempty words with a total of 2n letters over n-ary alphabet such that all n letters occur at least once in the multiset.
A257742
Number of multisets of nonempty words with a total of 2n letters over n-ary alphabet such that all n letters occur at least once in the multiset.
Terms
- a(0) =1a(1) =2a(2) =49a(3) =3334a(4) =428653a(5) =87804401a(6) =26047147641
External references
- oeis: A257742