Primes q of the form q = 10p + 1, where p is also prime.

Terms

a(0) =31a(1) =71a(2) =131a(3) =191a(4) =311a(5) =431a(6) =971a(7) =1031a(8) =1091a(9) =1511a(10) =1571a(11) =1811a(12) =1931a(13) =2111a(14) =2411a(15) =2711a(16) =3371a(17) =3491a(18) =3671a(19) =4091a(20) =4211a(21) =4391a(22) =4871a(23) =5231a(24) =5471a(25) =5711a(26) =6011a(27) =6131a(28) =6311a(29) =6911