a(n) = (1/n) * Sum_{d|n} moebius(n/d) * Lucas(d)^6, where Lucas(n) = A000204(n).
A203857
a(n) = (1/n) * Sum_{d|n} moebius(n/d) * Lucas(d)^6, where Lucas(n) = A000204(n).
Terms
- a(0) =1a(1) =364a(2) =1365a(3) =29230a(4) =354312a(5) =5667900a(6) =84974760a(7) =1347387210a(8) =21411102720a(9) =346282421940
External references
- oeis: A203857