Primes that remain prime through 3 iterations of function f(x) = 7x + 6.

Terms

a(0) =149a(1) =439a(2) =1319a(3) =2069a(4) =2089a(5) =2389a(6) =2699a(7) =2819a(8) =4259a(9) =4919a(10) =5059a(11) =5689a(12) =6469a(13) =7559a(14) =8429a(15) =8669a(16) =9199a(17) =9239a(18) =9319a(19) =9769a(20) =10159a(21) =10529a(22) =14449a(23) =14479a(24) =17659a(25) =18899a(26) =19289a(27) =23879a(28) =25189a(29) =29819