Odd numbers N for which numerator(sigma(N^2)/N^2) is prime but sigma(N^2) is composite.

A193072

Odd numbers N for which numerator(sigma(N^2)/N^2) is prime but sigma(N^2) is composite.

Terms

    a(0) =39a(1) =507a(2) =2379a(3) =6591a(4) =13167a(5) =29511a(6) =148955a(7) =1672209a(8) =8852259a(9) =212370543a(10) =1929229929

External references