a(n) = Sum_{d|n} A007955(d) * A000027(d) = Sum_{d|n} A007955(d) * (d), where A007955(m) = product of divisors of m.
A174933
a(n) = Sum_{d|n} A007955(d) * A000027(d) = Sum_{d|n} A007955(d) * (d), where A007955(m) = product of divisors of m.
Terms
- a(0) =1a(1) =5a(2) =10a(3) =37a(4) =26a(5) =230a(6) =50a(7) =549a(8) =253a(9) =1030a(10) =122a(11) =20998a(12) =170a(13) =2798a(14) =3410a(15) =16933a(16) =290a(17) =105449a(18) =362a(19) =161062a(20) =9320a(21) =10774a(22) =530a(23) =7984134a(24) =3151a(25) =17750a(26) =19936a(27) =617486a(28) =842a(29) =24304630
External references
- oeis: A174933