a(n) = Sum_{d|n} lcm(tau(d), pod(d)) where tau(k) is the number of divisors of k (A000005) and pod(k) is the product of divisors of k (A007955).
A334793
a(n) = Sum_{d|n} lcm(tau(d), pod(d)) where tau(k) is the number of divisors of k (A000005) and pod(k) is the product of divisors of k (A007955).
Terms
- a(0) =1a(1) =3a(2) =7a(3) =27a(4) =11a(5) =45a(6) =15a(7) =91a(8) =34a(9) =113a(10) =23a(11) =1797a(12) =27a(13) =213a(14) =917a(15) =5211a(16) =35a(17) =5904a(18) =39a(19) =24137a(20) =1785a(21) =509a(22) =47a(23) =333637a(24) =386a(25) =705a(26) =2950a(27) =66093a(28) =59a(29) =811055
External references
- oeis: A334793