Primes p such that the multiplicative order of 2 modulo p is (p-1)/6.

Terms

a(0) =31a(1) =223a(2) =433a(3) =439a(4) =457a(5) =727a(6) =919a(7) =1327a(8) =1399a(9) =1423a(10) =1471a(11) =1831a(12) =1999a(13) =2017a(14) =2287a(15) =2383a(16) =2671a(17) =2767a(18) =2791a(19) =2953a(20) =3271a(21) =3343a(22) =3457a(23) =3463a(24) =3607a(25) =3631a(26) =3823a(27) =3889a(28) =4129a(29) =4423