Numbers that are primitively represented by x^2 + xy + y^2.

Terms

a(0) =0a(1) =1a(2) =3a(3) =7a(4) =13a(5) =19a(6) =21a(7) =31a(8) =37a(9) =39a(10) =43a(11) =49a(12) =57a(13) =61a(14) =67a(15) =73a(16) =79a(17) =91a(18) =93a(19) =97a(20) =103a(21) =109a(22) =111a(23) =127a(24) =129a(25) =133a(26) =139a(27) =147a(28) =151a(29) =157