a(n) is the n-th J_5-prime (Josephus_5 prime).

Terms

a(0) =3a(1) =15a(2) =17a(3) =45a(4) =73a(5) =83a(6) =165a(7) =177a(8) =181a(9) =229a(10) =377a(11) =383a(12) =787a(13) =2585a(14) =3127a(15) =3635a(16) =4777a(17) =36417a(18) =63337a(19) =166705a(20) =418411