Number of sets of nonempty words with a total of n letters over senary alphabet such that all letters occur at least once in the set.
A320207
Number of sets of nonempty words with a total of n letters over senary alphabet such that all letters occur at least once in the set.
Terms
- a(0) =4051a(1) =111396a(2) =1830822a(3) =23420022a(4) =257667120a(5) =2564003346a(6) =23761098837a(7) =208907298660
External references
- oeis: A320207