Indices k such that A002533(k) is prime.

Terms

a(0) =2a(1) =3a(2) =4a(3) =5a(4) =11a(5) =17a(6) =32a(7) =53a(8) =103a(9) =107a(10) =109a(11) =113a(12) =137a(13) =197a(14) =233a(15) =811a(16) =7993a(17) =9281a(18) =14387a(19) =26573a(20) =51361