Numbers k for which phi(prime(k)) is a square.

Terms

a(0) =1a(1) =3a(2) =7a(3) =12a(4) =26a(5) =45a(6) =55a(7) =79a(8) =106a(9) =123a(10) =211a(11) =252a(12) =422a(13) =446a(14) =595a(15) =723a(16) =907a(17) =1019a(18) =1101a(19) =1448a(20) =1595a(21) =1687a(22) =1797a(23) =1849a(24) =1949a(25) =2058a(26) =2393a(27) =2516a(28) =2703a(29) =2819