Number of multisets of nonempty words with a total of n letters over denary alphabet such that within each prefix of a word every letter of the alphabet is at least as frequent as the subsequent alphabet letter.
A293740
Number of multisets of nonempty words with a total of n letters over denary alphabet such that within each prefix of a 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) =7a(4) =20a(5) =54a(6) =164a(7) =500a(8) =1630a(9) =5472a(10) =19257a(11) =70132a(12) =265845a(13) =1042187a(14) =4233556a(15) =17747898a(16) =76808746a(17) =342105748a(18) =1567582938a(19) =7371055703a(20) =35543320641a(21) =175391546006a(22) =884988267329
External references
- oeis: A293740