Numbers that remain prime through 7 iterations of function f(x) = 2x + 1.

Terms

a(0) =19099919a(1) =52554569a(2) =85864769a(3) =171729539a(4) =198479579a(5) =226366139a(6) =305192579a(7) =344319029a(8) =396959159a(9) =474118349a(10) =574964129a(11) =610385159a(12) =685066979a(13) =764406059a(14) =1085182229a(15) =1126004219a(16) =1195651139a(17) =1372213439a(18) =1484454269a(19) =1573750049a(20) =2270291519a(21) =2365144079a(22) =2400025739