Numbers n such that (4 * 6^n + 1)/5 is prime.

Terms

a(0) =1a(1) =2a(2) =3a(3) =5a(4) =15a(5) =25a(6) =29a(7) =73a(8) =90a(9) =139a(10) =194a(11) =242a(12) =939a(13) =3518a(14) =3963a(15) =4694a(16) =5570a(17) =5615a(18) =6702a(19) =13962a(20) =14269a(21) =16339a(22) =16882a(23) =22582a(24) =31415a(25) =105554a(26) =120749