Numbers n such that sigma(sigma(n) - phi(n)) = phi(n).

Terms

a(0) =707a(1) =7843a(2) =143591a(3) =274211a(4) =598787a(5) =737807a(6) =861749a(7) =928421a(8) =1515521a(9) =1682203a(10) =1936099a(11) =2223143a(12) =2709473a(13) =2908373a(14) =2985641a(15) =3669919a(16) =3689279a(17) =3825419a(18) =3848851a(19) =4154297a(20) =4429159a(21) =5321743a(22) =5654623a(23) =5678131a(24) =6548899a(25) =8916427a(26) =11403743a(27) =11474267a(28) =12191803a(29) =13340869