Numbers n such that Sum_{i=1..n} i^(i') == 0 (mod n), where i' is the arithmetic derivative of i.
A227502
Numbers n such that Sum_{i=1..n} i^(i') == 0 (mod n), where i' is the arithmetic derivative of i.
Terms
- a(0) =1a(1) =3a(2) =7a(3) =19a(4) =32a(5) =57a(6) =99a(7) =103a(8) =439a(9) =540a(10) =2656a(11) =18156a(12) =179171a(13) =235056
External references
- oeis: A227502