Indices of prime Perrin numbers; values of n such that A001608(n) is prime.

Terms

a(0) =2a(1) =3a(2) =4a(3) =5a(4) =6a(5) =7a(6) =10a(7) =12a(8) =20a(9) =21a(10) =24a(11) =34a(12) =38a(13) =75a(14) =122a(15) =166a(16) =236a(17) =355a(18) =356a(19) =930a(20) =1042a(21) =1214a(22) =1461a(23) =1622a(24) =4430a(25) =5802a(26) =9092a(27) =16260a(28) =18926a(29) =23698