a(n) = (1/n) * Sum_{d|n} moebius(n/d) * Lucas(d)^8, where Lucas(n) = A000204(n).
A203859
a(n) = (1/n) * Sum_{d|n} moebius(n/d) * Lucas(d)^8, where Lucas(n) = A000204(n).
Terms
- a(0) =1a(1) =3280a(2) =21845a(3) =1439560a(4) =42871776a(5) =1836648080a(6) =71463773280
External references
- oeis: A203859