Primes p such that 10*p-1, 10*p-3, 10*p-7 and 10*p-9 are all prime.

Terms

a(0) =2a(1) =11a(2) =83a(3) =149a(4) =347a(5) =1301a(6) =1607a(7) =2531a(8) =6299a(9) =7727a(10) =8273a(11) =17117a(12) =20183a(13) =21737a(14) =24371a(15) =26669a(16) =39227a(17) =40277a(18) =53951a(19) =54917a(20) =63347a(21) =66359a(22) =66467a(23) =73637a(24) =82217a(25) =82373a(26) =101537a(27) =102251a(28) =106397a(29) =106871