Numbers of form 2x^2 + 2xy + 3y^2.

Terms

a(0) =0a(1) =2a(2) =3a(3) =7a(4) =8a(5) =10a(6) =12a(7) =15a(8) =18a(9) =23a(10) =27a(11) =28a(12) =32a(13) =35a(14) =40a(15) =42a(16) =43a(17) =47a(18) =48a(19) =50a(20) =58a(21) =60a(22) =63a(23) =67a(24) =72a(25) =75a(26) =82a(27) =83a(28) =87a(29) =90