Numbers n such that 2^n == sigma(n) (mod n).

Terms

a(0) =1a(1) =12a(2) =286a(3) =5978a(4) =111136a(5) =283584a(6) =339379a(7) =1102652a(8) =8830498a(9) =27952828a(10) =30442612a(11) =84638560a(12) =90619592a(13) =101907952a(14) =175917947