Number of multisets of nonempty words with a total of n letters over septenary alphabet containing the seventh letter such that within each prefix of a word every letter of the alphabet is at least as frequent as the subsequent alphabet letter.
A293802
Number of multisets of nonempty words with a total of n letters over septenary alphabet containing the seventh letter 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) =8a(2) =65a(3) =402a(4) =2457a(5) =13715a(6) =75997a(7) =405672a(8) =2160487a(9) =11323773a(10) =59410323a(11) =309820614a(12) =1620398321a(13) =8465984310a(14) =44406170067a(15) =233282360743
External references
- oeis: A293802