Primes which when concatenated with next two primes are also prime.

Terms

a(0) =5a(1) =11a(2) =17a(3) =31a(4) =41a(5) =89a(6) =229a(7) =239a(8) =263a(9) =307a(10) =313a(11) =317a(12) =353a(13) =359a(14) =383a(15) =389a(16) =401a(17) =409a(18) =439a(19) =449a(20) =563a(21) =619a(22) =701a(23) =761a(24) =773a(25) =787a(26) =797a(27) =827a(28) =907a(29) =929