Primes that remain prime through 4 iterations of function f(x) = 7x + 6.

Terms

a(0) =1319a(1) =2699a(2) =4259a(3) =4919a(4) =5689a(5) =8669a(6) =10159a(7) =10529a(8) =29819a(9) =33119a(10) =82339a(11) =86689a(12) =98669a(13) =174079a(14) =177949a(15) =196739a(16) =207869a(17) =210599a(18) =222499a(19) =231809a(20) =253369a(21) =267299a(22) =275699a(23) =323699a(24) =362459a(25) =371639a(26) =378179a(27) =388529a(28) =397799a(29) =402529