Positions of primes in A003136 (ordered distinct numbers i^2 - i*j + j^2).

Terms

a(0) =3a(1) =5a(2) =8a(3) =10a(4) =15a(5) =17a(6) =19a(7) =24a(8) =27a(9) =28a(10) =31a(11) =36a(12) =38a(13) =40a(14) =46a(15) =49a(16) =53a(17) =55a(18) =56a(19) =61a(20) =65a(21) =67a(22) =70a(23) =73a(24) =76a(25) =78a(26) =86a(27) =88a(28) =90a(29) =97