Number of multisets of nonempty words with a total of n letters over quinary alphabet containing the fifth letter such that within each prefix of a word every letter of the alphabet is at least as frequent as the subsequent alphabet letter.
A293800
Number of multisets of nonempty words with a total of n letters over quinary alphabet containing the fifth 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) =6a(2) =37a(3) =178a(4) =852a(5) =3767a(6) =16576a(7) =70635a(8) =300433a(9) =1260163a(10) =5287178a(11) =22058377a(12) =92181691a(13) =384663989a(14) =1609206870a(15) =6737170404a(16) =28291573975a(17) =119043337521a(18) =502559706310
External references
- oeis: A293800