Number of sets of nonempty words with a total of n letters over 7-ary alphabet.

A292841

Number of sets of nonempty words with a total of n letters over 7-ary alphabet.

Terms

    a(0) =1a(1) =7a(2) =70a(3) =721a(4) =7042a(5) =67592a(6) =636517a(7) =5904746a(8) =54072137a(9) =489655873a(10) =4390760297a(11) =39030158111a(12) =344244293260

External references