Least prime containing at least n consecutive 1's in its binary representation.

Terms

a(0) =2a(1) =2a(2) =3a(3) =7a(4) =31a(5) =31a(6) =127a(7) =127a(8) =1021a(9) =3583a(10) =4093a(11) =6143a(12) =8191a(13) =8191a(14) =81919a(15) =131071a(16) =131071a(17) =131071a(18) =524287a(19) =524287a(20) =4194301a(21) =14680063a(22) =16777213a(23) =67108859a(24) =536870909a(25) =536870909a(26) =536870909a(27) =536870909a(28) =2147483647a(29) =2147483647