Primes p such that the base-10 concatenations (p+1)||p and (p+1)||(p+1)||p are both prime.

Terms

a(0) =3a(1) =197a(2) =263a(3) =281a(4) =443a(5) =881a(6) =887a(7) =947a(8) =2111a(9) =2129a(10) =2237a(11) =2699a(12) =2741a(13) =2897a(14) =3251a(15) =3539a(16) =3821a(17) =3881a(18) =4049a(19) =4451a(20) =4523a(21) =4787a(22) =6257a(23) =6389a(24) =8609a(25) =8741a(26) =10163a(27) =10193a(28) =10247a(29) =11027