Primes of the form 45*2^n - 1.

Terms

a(0) =89a(1) =179a(2) =359a(3) =719a(4) =1439a(5) =2879a(6) =11519a(7) =23039a(8) =737279a(9) =1474559a(10) =2949119a(11) =188743679a(12) =12079595519a(13) =24159191039