a(n) = denominator of Sum_{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).

A324364

a(n) = denominator of Sum_{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) =2a(2) =3a(3) =8a(4) =5a(5) =6a(6) =7a(7) =64a(8) =27a(9) =25a(10) =11a(11) =432a(12) =13a(13) =98a(14) =25a(15) =1024a(16) =17a(17) =1944a(18) =19a(19) =4000a(20) =441a(21) =242a(22) =23a(23) =9216a(24) =125a(25) =169a(26) =729a(27) =14a(28) =29a(29) =11250

External references