Number of multisets of nonempty words with a total of n letters over quinary alphabet such that within each prefix of a word every letter of the alphabet is at least as frequent as the subsequent alphabet letter.
A293735
Number of multisets of nonempty words with a total of n letters over quinary 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) =163a(7) =492a(8) =1571a(9) =5122a(10) =17262a(11) =59483a(12) =209958a(13) =755615a(14) =2770994a(15) =10330036a(16) =39103166a(17) =150073289a(18) =583329574a(19) =2293822828a(20) =9116935874a(21) =36593731182a(22) =148221246775a(23) =605427601519
External references
- oeis: A293735