a(0)=1, a(1)=9, a(n) = sum_{k=0}^{k=n-1} 9^k a(k).
A015497
a(0)=1, a(1)=9, a(n) = sum_{k=0}^{k=n-1} 9^k a(k).
Terms
- a(0) =1a(1) =9a(2) =82a(3) =6724a(4) =4908520a(5) =32209708240
External references
- oeis: A015497
A015497
a(0)=1, a(1)=9, a(n) = sum_{k=0}^{k=n-1} 9^k a(k).