a(n) = Sum_{d|n} Moebius(n/d)*d^(b-1)/phi(n) for b = 18.
A161213
a(n) = Sum_{d|n} Moebius(n/d)*d^(b-1)/phi(n) for b = 18.
Terms
- a(0) =1a(1) =131071a(2) =64570081a(3) =8589869056a(4) =190734863281
External references
- oeis: A161213
A161213
a(n) = Sum_{d|n} Moebius(n/d)*d^(b-1)/phi(n) for b = 18.