Number of sets of nonempty words with a total of 2n letters over n-ary alphabet such that all n letters occur at least once in the set.
A319519
Number of sets of nonempty words with a total of 2n letters over n-ary alphabet such that all n letters occur at least once in the set.
Terms
- a(0) =1a(1) =1a(2) =38a(3) =2811a(4) =375698a(5) =78808600a(6) =23761098837
External references
- oeis: A319519