Indices of primes in sequence A108300.

Terms

a(0) =1a(1) =3a(2) =9a(3) =15a(4) =39a(5) =225a(6) =231a(7) =363a(8) =687a(9) =1299a(10) =1335a(11) =1809a(12) =2367a(13) =12735