Numbers k such that 6^k - 5^k is prime.

Terms

a(0) =2a(1) =5a(2) =11a(3) =13a(4) =23a(5) =61a(6) =83a(7) =421a(8) =1039a(9) =1511a(10) =31237a(11) =60413a(12) =113177a(13) =135647a(14) =258413