a(0)=1, a(1)=7, a(n) = sum_{k=0}^{k=n-1} 7^k a(k).
A015495
a(0)=1, a(1)=7, a(n) = sum_{k=0}^{k=n-1} 7^k a(k).
Terms
- a(0) =1a(1) =7a(2) =50a(3) =2500a(4) =860000a(5) =2065720000
External references
- oeis: A015495
A015495
a(0)=1, a(1)=7, a(n) = sum_{k=0}^{k=n-1} 7^k a(k).