a(n) = lcm(tau(n), pod(n)) / n, where tau(k) = the number of divisors of k (A000005) and pod(n) = the product of divisors of k (A007955).

A307892

a(n) = lcm(tau(n), pod(n)) / n, where tau(k) = the number of divisors of k (A000005) and pod(n) = the product of divisors of k (A007955).

Terms

    a(0) =1a(1) =1a(2) =2a(3) =6a(4) =2a(5) =6a(6) =2a(7) =8a(8) =3a(9) =10a(10) =2a(11) =144a(12) =2a(13) =14a(14) =60a(15) =320a(16) =2a(17) =324a(18) =2a(19) =1200a(20) =84a(21) =22a(22) =2a(23) =13824a(24) =15a(25) =26a(26) =108a(27) =2352a(28) =2a(29) =27000

External references