a(n) = (16^(n+1) - 15*n - 16)/225.

A014899

a(n) = (16^(n+1) - 15*n - 16)/225.

Terms

    a(0) =0a(1) =1a(2) =18a(3) =291a(4) =4660a(5) =74565a(6) =1193046a(7) =19088743a(8) =305419896a(9) =4886718345a(10) =78187493530

External references