Number of multisets of nonempty words with a total of n letters over nonary alphabet containing the ninth letter such that within each prefix of a word every letter of the alphabet is at least as frequent as the subsequent alphabet letter.
A293804
Number of multisets of nonempty words with a total of n letters over nonary alphabet containing the ninth 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) =10a(2) =101a(3) =762a(4) =5644a(5) =37759a(6) =249346a(7) =1575028a(8) =9882928a(9) =60748286a(10) =372625221a(11) =2265134302a(12) =13781508870a(13) =83609540368a(14) =508633993673
External references
- oeis: A293804