Indices of primes in A266891.

Terms

a(0) =3a(1) =4a(2) =25a(3) =36a(4) =54a(5) =116a(6) =122a(7) =303a(8) =559a(9) =649a(10) =720a(11) =1294a(12) =1359a(13) =1757a(14) =2727a(15) =2938a(16) =3618a(17) =3661a(18) =4217a(19) =10143a(20) =12204a(21) =13382a(22) =14136a(23) =15398a(24) =23661a(25) =25880a(26) =32345a(27) =37859a(28) =44955a(29) =50119