Largest prime factor of [e*2^n].

Terms

a(0) =2a(1) =5a(2) =5a(3) =7a(4) =43a(5) =43a(6) =173a(7) =347a(8) =139a(9) =107a(10) =23a(11) =293a(12) =293a(13) =293a(14) =293a(15) =293a(16) =79a(17) =79a(18) =883a(19) =883a(20) =114013a(21) =114013a(22) =114013a(23) =114013a(24) =1232573a(25) =1232573a(26) =1499a(27) =364841611a(28) =364841611a(29) =364841611