Primes that remain prime through 4 iterations of function f(x) = 5x + 8.

Terms

a(0) =7a(1) =43a(2) =883a(3) =2269a(4) =2917a(5) =7621a(6) =15541a(7) =15937a(8) =36541a(9) =38113a(10) =54787a(11) =60961a(12) =67033a(13) =71359a(14) =77491a(15) =79693a(16) =82531a(17) =84967a(18) =112621a(19) =129589a(20) =176461a(21) =185683a(22) =192547a(23) =239671a(24) =248071a(25) =267373a(26) =271489a(27) =271549a(28) =310231a(29) =316471