Primes with subscripts described in A098213.

Terms

a(0) =2a(1) =2a(2) =2a(3) =19a(4) =113a(5) =509a(6) =2551a(7) =19267a(8) =75041a(9) =753143a(10) =4310819a(11) =38238461a(12) =307379717a(13) =805592213a(14) =13341291553