a(n) = ((2^b-1)/phi(n))*Sum_{d|n} Moebius(n/d)*d^(b-1) for b = 13.
A161024
a(n) = ((2^b-1)/phi(n))*Sum_{d|n} Moebius(n/d)*d^(b-1) for b = 13.
Terms
- a(0) =8191a(1) =33542145a(2) =2176512520a(3) =68694312960a(4) =499938962796
External references
- oeis: A161024