Smallest prime between 2^n and 2^(n+1), having a minimal number of 1's in binary representation.

Terms

a(0) =2a(1) =5a(2) =11a(3) =17a(4) =37a(5) =67a(6) =131a(7) =257a(8) =521a(9) =1033a(10) =2053a(11) =4099a(12) =8209a(13) =16417a(14) =32771a(15) =65537a(16) =133121a(17) =262147a(18) =524353a(19) =1048609a(20) =2097169a(21) =4194433a(22) =8388617a(23) =16777729a(24) =33554467a(25) =67239937a(26) =134250497a(27) =268435459a(28) =536903681a(29) =1073741827