Numbers n such that 7^n - 8 is prime.

Terms

a(0) =2a(1) =4a(2) =8a(3) =10a(4) =50a(5) =106a(6) =182a(7) =293a(8) =964a(9) =1108a(10) =1654a(11) =1756a(12) =4601a(13) =8870a(14) =15100a(15) =17446a(16) =22742a(17) =34570a(18) =50150a(19) =95276