Numbers n such that the n-th Lucas number is prime, but cannot be written in the form a^2 + 5*b^2.

Terms

a(0) =0a(1) =2a(2) =5a(3) =7a(4) =8a(5) =11a(6) =16a(7) =17a(8) =19a(9) =37a(10) =41a(11) =47a(12) =53a(13) =71a(14) =79a(15) =113a(16) =353a(17) =503a(18) =617a(19) =863a(20) =1097a(21) =1361a(22) =4787a(23) =4793a(24) =8467a(25) =10691a(26) =12251a(27) =14449a(28) =19469a(29) =35449