Primes that remain prime through 4 iterations of the function f(x) = 9x + 8.

Terms

a(0) =397a(1) =467a(2) =907a(3) =1747a(4) =1901a(5) =4099a(6) =7237a(7) =8117a(8) =8581a(9) =9371a(10) =9587a(11) =23539a(12) =28081a(13) =32611a(14) =36899a(15) =41729a(16) =54767a(17) =55207a(18) =57601a(19) =61991a(20) =64997a(21) =66449a(22) =73061a(23) =74821a(24) =75527a(25) =86291a(26) =115021a(27) =118717a(28) =125659a(29) =126067