Numbers k such that (2^k + 5) / 3 is prime.

Terms

a(0) =0a(1) =2a(2) =4a(3) =6a(4) =12a(5) =18a(6) =24a(7) =42a(8) =84a(9) =300a(10) =390a(11) =780a(12) =822a(13) =2430a(14) =5508a(15) =5514a(16) =6492a(17) =12372a(18) =22680a(19) =25770a(20) =169416a(21) =174240a(22) =383544a(23) =1007838a(24) =1572882