Numbers n such that the n-th Lucas number is prime, but cannot be written in the form a^2 + 6*b^2.

Terms

a(0) =0a(1) =2a(2) =5a(3) =7a(4) =8a(5) =13a(6) =16a(7) =17a(8) =19a(9) =31a(10) =37a(11) =41a(12) =47a(13) =53a(14) =61a(15) =71a(16) =79a(17) =113a(18) =353a(19) =503a(20) =613a(21) =617a(22) =863a(23) =1097a(24) =1361a(25) =4793a(26) =5851a(27) =7741a(28) =8467a(29) =13963