Indices of primes in A007443.

Terms

a(0) =1a(1) =2a(2) =3a(3) =5a(4) =9a(5) =22a(6) =25a(7) =28a(8) =32a(9) =41a(10) =99a(11) =104a(12) =138a(13) =183a(14) =225a(15) =361a(16) =641a(17) =1636a(18) =1719a(19) =3191a(20) =3590a(21) =4144a(22) =5340a(23) =6372a(24) =6893a(25) =6915a(26) =8429a(27) =10024a(28) =10546a(29) =16401