Numbers that are imprimitively (and possibly also primitively) represented by x^2+xy+y^2.

Terms

a(0) =4a(1) =9a(2) =12a(3) =16a(4) =25a(5) =27a(6) =28a(7) =36a(8) =48a(9) =49a(10) =52a(11) =63a(12) =64a(13) =75a(14) =76a(15) =81a(16) =84a(17) =100a(18) =108a(19) =112a(20) =117a(21) =121a(22) =124a(23) =144a(24) =147a(25) =148a(26) =156a(27) =169a(28) =171a(29) =172