a(1) = 7; for n > 0, a(n+1) = a(n) * sum of digits of a(n).
A047899
a(1) = 7; for n > 0, a(n+1) = a(n) * sum of digits of a(n).
Terms
- a(0) =7a(1) =49a(2) =637a(3) =10192a(4) =132496a(5) =3312400a(6) =43061200a(7) =688979200a(8) =33759980800
External references
- oeis: A047899