Positions of proper prime powers (A246547) in EKG-sequence.

Terms

a(0) =3a(1) =6a(2) =8a(3) =17a(4) =22a(5) =24a(6) =31a(7) =50a(8) =64a(9) =76a(10) =112a(11) =122a(12) =124a(13) =171a(14) =232a(15) =240a(16) =290a(17) =319a(18) =359a(19) =485a(20) =521a(21) =595a(22) =696a(23) =823a(24) =947a(25) =982a(26) =1279a(27) =1313a(28) =1642a(29) =1810