Numbers k such that 33*10^k + 1 is prime.

Terms

a(0) =1a(1) =2a(2) =5a(3) =6a(4) =7a(5) =8a(6) =29a(7) =47a(8) =145a(9) =205a(10) =227a(11) =505a(12) =553a(13) =600a(14) =787a(15) =809a(16) =1305a(17) =1447a(18) =1593a(19) =2285a(20) =4763a(21) =5679a(22) =9133a(23) =12516a(24) =14869a(25) =16536a(26) =33402a(27) =36085a(28) =51933a(29) =56443