Numbers k such that (10^k + 101)/3 is prime.

Terms

a(0) =1a(1) =2a(2) =3a(3) =6a(4) =9a(5) =12a(6) =23a(7) =39a(8) =59a(9) =168a(10) =198a(11) =203a(12) =231a(13) =449a(14) =863a(15) =920a(16) =1064a(17) =1484a(18) =1674a(19) =2018a(20) =2943a(21) =3123a(22) =4073a(23) =4122a(24) =8360a(25) =11774a(26) =16031a(27) =26507a(28) =31146a(29) =33170