Numbers n such that 241*2^n-1 is prime.

Terms

a(0) =11a(1) =17a(2) =19a(3) =39a(4) =69a(5) =321a(6) =653a(7) =1109a(8) =3819a(9) =5729a(10) =9659a(11) =9911a(12) =13217a(13) =16707a(14) =22307a(15) =65107a(16) =75419a(17) =97587a(18) =99667a(19) =336197a(20) =407709a(21) =497679