a(n) = (1/n) * Sum_{d|n} moebius(n/d) * Lucas(d)^5, where Lucas(n) = A000204(n).
A203856
a(n) = (1/n) * Sum_{d|n} moebius(n/d) * Lucas(d)^5, where Lucas(n) = A000204(n).
Terms
- a(0) =1a(1) =121a(2) =341a(3) =4141a(4) =32210a(5) =314717a(6) =2930164a(7) =28666025a(8) =281724928a(9) =2815289555a(10) =28370872818a(11) =288468152625
External references
- oeis: A203856