Numbers n such that 77*2^n-1 is prime.

Terms

a(0) =2a(1) =4a(2) =14a(3) =26a(4) =58a(5) =60a(6) =64a(7) =100a(8) =122a(9) =212a(10) =566a(11) =638a(12) =1214a(13) =2080a(14) =4852a(15) =5356a(16) =5720a(17) =7044a(18) =8320a(19) =8556a(20) =10684a(21) =14584a(22) =39016a(23) =47972a(24) =72008a(25) =217956a(26) =223512a(27) =387680a(28) =441528a(29) =607920