Number of multisets of nonempty words with a total of n letters over octonary alphabet such that within each prefix of a word every letter of the alphabet is at least as frequent as the subsequent alphabet letter.
A293738
Number of multisets of nonempty words with a total of n letters over octonary 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) =5471a(10) =19246a(11) =70020a(12) =264961a(13) =1035540a(14) =4187725a(15) =17440159a(16) =74817905a(17) =329400093a(18) =1487844185a(19) =6873585346a(20) =32460719143a(21) =156315314070a(22) =767106102127
External references
- oeis: A293738