Number of sets of nonempty words with a total of n letters over quinary alphabet such that within each word every letter of the alphabet is at least as frequent as the subsequent alphabet letter.
A340412
Number of sets of nonempty words with a total of n letters over quinary alphabet such that within each word every letter of the alphabet is at least as frequent as the subsequent alphabet letter.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =13a(4) =60a(5) =326a(6) =1345a(7) =6228a(8) =29845a(9) =143899a(10) =732765a(11) =3412167a(12) =16623175a(13) =81624325a(14) =400892932a(15) =2018593583a(16) =9773821243a(17) =48292202375a(18) =239383150209
External references
- oeis: A340412