Numbers k such that 157*2^k+1 is prime.

Terms

a(0) =8a(1) =12a(2) =14a(3) =24a(4) =32a(5) =134a(6) =252a(7) =272a(8) =404a(9) =1460a(10) =1776a(11) =8510a(12) =14280a(13) =14396a(14) =17736a(15) =21284a(16) =84056a(17) =147036a(18) =490772a(19) =963590a(20) =1920152a(21) =2407958