Primes p of form x^2 - phi(x) such that (p-1)/tau(p-1) is also prime.

Terms

a(0) =157a(1) =1069a(2) =61837a(3) =190573a(4) =840109a(5) =1950349a(6) =2485453a(7) =20616397a(8) =38844349a(9) =57648589a(10) =133091053a(11) =144685357a(12) =188582029a(13) =222029869a(14) =276773389a(15) =346282477a(16) =399067213a(17) =472656589a(18) =827175949a(19) =929558797a(20) =1137622957a(21) =1352220109a(22) =1369037389