Number of sets of nonempty words with a total of n letters over senary alphabet containing the sixth letter such that within each prefix of a word every letter of the alphabet is at least as frequent as the subsequent alphabet letter.
A293887
Number of sets of nonempty words with a total of n letters over senary alphabet containing the sixth 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) =7a(2) =49a(3) =268a(4) =1448a(5) =7228a(6) =35878a(7) =172470a(8) =828380a(9) =3924415a(10) =18627313a(11) =87940196a(12) =416581962a(13) =1971018227a(14) =9364427840a(15) =44535275966a(16) =212749669917
External references
- oeis: A293887