Primes p such that p-6, p and p+6 are consecutive primes.

Terms

a(0) =53a(1) =157a(2) =173a(3) =257a(4) =263a(5) =373a(6) =563a(7) =593a(8) =607a(9) =653a(10) =733a(11) =947a(12) =977a(13) =1103a(14) =1123a(15) =1187a(16) =1223a(17) =1367a(18) =1747a(19) =1753a(20) =1907a(21) =2287a(22) =2417a(23) =2677a(24) =2903a(25) =2963a(26) =3307a(27) =3313a(28) =3637a(29) =3733