Numbers k such that k=prime(sigma(phi(pi(k)))).

Terms

a(0) =2a(1) =5a(2) =47a(3) =107a(4) =1613a(5) =5653a(6) =21557a(7) =230047a(8) =821603a(9) =8145173a(10) =47073007a(11) =68939141a(12) =76040521a(13) =196388147a(14) =240595631a(15) =433046543a(16) =1085166671a(17) =2269551127a(18) =4670405591a(19) =9784786813a(20) =104484802043a(21) =420065905307a(22) =474962067289