Primes that remain prime through 5 iterations of function f(x) = 8x + 7.

Terms

a(0) =25589a(1) =220469a(2) =225629a(3) =286619a(4) =783269a(5) =1215629a(6) =1407389a(7) =1542029a(8) =1642919a(9) =2329469a(10) =2776979a(11) =3104159a(12) =4082759a(13) =4229129a(14) =5405999a(15) =5905619a(16) =6548849a(17) =6862859a(18) =7681409a(19) =7904669a(20) =8623799a(21) =8971049a(22) =9599309a(23) =9658469a(24) =9725039a(25) =11420579