Primes for which the three closest primes are smaller.

Terms

a(0) =113a(1) =199a(2) =317a(3) =467a(4) =829a(5) =863a(6) =887a(7) =1129a(8) =1307a(9) =1327a(10) =1637a(11) =1669a(12) =1879a(13) =1951a(14) =2089a(15) =2251a(16) =2311a(17) =2477a(18) =2557a(19) =2803a(20) =2971a(21) =3229a(22) =3259a(23) =3271a(24) =3373a(25) =3469a(26) =3739a(27) =3947a(28) =4027a(29) =4139