Numbers n such that the denominator of the 2n-th Bernoulli number is divisible by n but sum_{d|n} sigma(d)/phi(d) is not an integer.

A099008

Numbers n such that the denominator of the 2n-th Bernoulli number is divisible by n but sum_{d|n} sigma(d)/phi(d) is not an integer.

Terms

    a(0) =546a(1) =903a(2) =1806a(3) =2730a(4) =6162a(5) =6510a(6) =9030a(7) =10230a(8) =12090a(9) =12246a(10) =12810a(11) =15834a(12) =20130a(13) =20670a(14) =23478a(15) =23790a(16) =28938a(17) =30030a(18) =30810a(19) =43134a(20) =44310a(21) =52374a(22) =56730a(23) =61230a(24) =71610a(25) =79170a(26) =84630a(27) =85722a(28) =88410a(29) =99330

External references