a(n) = Product_{d|n} lcm(tau(d), sigma(d)) where tau(k) is the number of divisors of k (A000005) and sigma(k) is the sum of divisors of k (A000203).
A334806
a(n) = Product_{d|n} lcm(tau(d), sigma(d)) where tau(k) is the number of divisors of k (A000005) and sigma(k) is the sum of divisors of k (A000203).
Terms
- a(0) =1a(1) =6a(2) =4a(3) =126a(4) =6a(5) =288a(6) =8a(7) =7560a(8) =156a(9) =1296a(10) =12a(11) =508032a(12) =14a(13) =1152a(14) =576a(15) =1171800a(16) =18a(17) =876096a(18) =20a(19) =1143072a(20) =1024a(21) =2592a(22) =24a(23) =3657830400a(24) =558a(25) =7056a(26) =6240a(27) =4064256a(28) =30a(29) =107495424
External references
- oeis: A334806