Number of n-length words w over a 7-ary alphabet {a_1,...,a_7} such that w contains never more than j consecutive letters a_j (for 1<=j<=7).

A242630

Number of n-length words w over a 7-ary alphabet {a_1,...,a_7} such that w contains never more than j consecutive letters a_j (for 1<=j<=7).

Terms

    a(0) =1a(1) =7a(2) =48a(3) =329a(4) =2254a(5) =15443a(6) =105804a(7) =724892a(8) =4966431a(9) =34026362a(10) =233123809a(11) =1597194268a(12) =10942809918a(13) =74972150416a(14) =513654479985

External references