a(0) = 2; a(n) = least prime p such that p >= a(n-1) + 2^n.

Terms

a(0) =2a(1) =5a(2) =11a(3) =19a(4) =37a(5) =71a(6) =137a(7) =269a(8) =541a(9) =1061a(10) =2087a(11) =4139a(12) =8237a(13) =16433a(14) =32831a(15) =65599a(16) =131143a(17) =262217a(18) =524369a(19) =1048661a(20) =2097257a(21) =4194409a(22) =8388733a(23) =16777381a(24) =33554639a(25) =67109071a(26) =134217943a(27) =268435697a(28) =536871157a(29) =1073742073