Numbers k such that phi(sigma(k)+k) = sigma(k).

Terms

a(0) =1a(1) =7a(2) =15a(3) =127a(4) =267a(5) =315a(6) =495a(7) =621a(8) =969a(9) =1155a(10) =1917a(11) =5649a(12) =7515a(13) =12267a(14) =14911a(15) =17271a(16) =22347a(17) =26265a(18) =28671a(19) =30549a(20) =31641a(21) =32895a(22) =45195a(23) =48093a(24) =56697a(25) =60801a(26) =64923a(27) =77409a(28) =79827a(29) =82731