Numbers of the form m = 2^i + 2^j, where i > j >= 0, such that m - 1 is prime.

Terms

a(0) =3a(1) =6a(2) =12a(3) =18a(4) =20a(5) =24a(6) =48a(7) =68a(8) =72a(9) =80a(10) =132a(11) =192a(12) =258a(13) =264a(14) =272a(15) =384a(16) =1032a(17) =1040a(18) =1088a(19) =1152a(20) =1280a(21) =2064a(22) =2112a(23) =4100a(24) =4112a(25) =4128a(26) =4160a(27) =5120a(28) =6144a(29) =8448