Exactly one of (2^n-1)^2-2 and (2^n+1)^2-2 is prime.

Terms

a(0) =0a(1) =1a(2) =4a(3) =5a(4) =6a(5) =7a(6) =8a(7) =9a(8) =10a(9) =17a(10) =19a(11) =23a(12) =25a(13) =32a(14) =51a(15) =55a(16) =65a(17) =87a(18) =129a(19) =132a(20) =159a(21) =171a(22) =175a(23) =180a(24) =242a(25) =315a(26) =324a(27) =358a(28) =393a(29) =435