Numbers k such that 1 + Sum_{i=1..k} 2^(2*i-1) is prime.

Terms

a(0) =1a(1) =2a(2) =3a(3) =5a(4) =6a(5) =8a(6) =9a(7) =11a(8) =15a(9) =21a(10) =30a(11) =39a(12) =50a(13) =63a(14) =83a(15) =95a(16) =99a(17) =156a(18) =173a(19) =350a(20) =854a(21) =1308a(22) =1769a(23) =2903a(24) =5250a(25) =5345a(26) =5639a(27) =6195a(28) =7239a(29) =21368