Primes p such that p - phi(k)^2 is not prime for 1 <= phi(k)^2 < p.

Terms

a(0) =2a(1) =5a(2) =13a(3) =31a(4) =37a(5) =61a(6) =127a(7) =379a(8) =439a(9) =571a(10) =619a(11) =739a(12) =829a(13) =991a(14) =1549a(15) =3109a(16) =3301a(17) =3319a(18) =5749a(19) =7549a(20) =7879a(21) =48799