Primes for which the four closest primes are smaller.

Terms

a(0) =113a(1) =1327a(2) =2557a(3) =2803a(4) =2971a(5) =3271a(6) =3469a(7) =4027a(8) =4297a(9) =4523a(10) =5119a(11) =5449a(12) =5531a(13) =5591a(14) =7253a(15) =7883a(16) =8389a(17) =9013a(18) =9439a(19) =9551a(20) =10111a(21) =10909a(22) =11177a(23) =11839a(24) =12119a(25) =12163a(26) =12853a(27) =12923a(28) =13187a(29) =13339