a(n) = Product_{d|n} (sigma(d)*pod(d)) where sigma(k) = the sum of the divisors of k (A000203) and pod(k) = the product of the divisors of k (A007955).
A325030
a(n) = Product_{d|n} (sigma(d)*pod(d)) where sigma(k) = the sum of the divisors of k (A000203) and pod(k) = the product of the divisors of k (A007955).
Terms
- a(0) =1a(1) =6a(2) =12a(3) =336a(4) =30a(5) =31104a(6) =56a(7) =322560a(8) =4212a(9) =324000a(10) =132a(11) =84276412416a(12) =182a(13) =1580544a(14) =1944000a(15) =10239344640a(16) =306a(18) =380a(20) =9483264a(21) =13799808a(22) =552a(24) =116250a(25) =31004064a(26) =122821920a(28) =870
External references
- oeis: A325030