Numbers k such that Sum_{i=1..k} (i-tau(i))^i == 0 (mod k), where tau(i) = A000005(i), the number of divisors of i, and i-tau(i) = A049820(i).
A229210
Numbers k such that Sum_{i=1..k} (i-tau(i))^i == 0 (mod k), where tau(i) = A000005(i), the number of divisors of i, and i-tau(i) = A049820(i).
Terms
- a(0) =1a(1) =2a(2) =5a(3) =24a(4) =36a(5) =371a(6) =445a(7) =1578a(8) =3616a(9) =9292a(10) =38123a(11) =142815a(12) =184097
External references
- oeis: A229210