Primes p such that f(p) and f(f(p)) are primes, where f(x) = x^2+3*x+1.

Terms

a(0) =3a(1) =19a(2) =29a(3) =59a(4) =113a(5) =373a(6) =379a(7) =419a(8) =449a(9) =593a(10) =643a(11) =929a(12) =983a(13) =1063a(14) =1423a(15) =2053a(16) =2069a(17) =3169a(18) =3593a(19) =3943a(20) =4159a(21) =4493a(22) =5153a(23) =6163a(24) =6659a(25) =6689a(26) =6869a(27) =6949a(28) =7583a(29) =8963