Smallest prime q such that q + prime(n) is a power of 2.

Terms

a(0) =2a(1) =5a(2) =3a(3) =549755813881a(4) =5a(5) =3a(6) =47a(7) =13a(8) =41a(9) =3a(10) =97a(11) =2011a(12) =23a(13) =536870869a(14) =17a(15) =11a(16) =5a(17) =3a(18) =61a(19) =953a(20) =439a(21) =433a(22) =173a(23) =167a(24) =31a(25) =67108763a(26) =409a(27) =149a(28) =19a(29) =911