Numbers k such that 263*2^k-1 is prime.

Terms

a(0) =2a(1) =6a(2) =26a(3) =114a(4) =134a(5) =180a(6) =542a(7) =882a(8) =936a(9) =2382a(10) =3702a(11) =5082a(12) =6722a(13) =15590a(14) =19910a(15) =26964a(16) =29148a(17) =48062a(18) =54870a(19) =69642a(20) =73788a(21) =79922a(22) =95460a(23) =215712