Numbers k such that phi(prime(k) + 1) == 0 (mod k).

Terms

a(0) =1a(1) =2a(2) =4a(3) =6a(4) =8a(5) =24a(6) =36a(7) =48a(8) =80a(9) =192a(10) =1440a(11) =3960a(12) =5184a(13) =5478a(14) =6480a(15) =16080a(16) =20336a(17) =29628a(18) =40073a(19) =40083a(20) =43056a(21) =44980a(22) =85800a(23) =200320a(24) =241920a(25) =252378a(26) =258048a(27) =287040a(28) =697248a(29) =1805672