Discriminants of imaginary quadratic fields, negated.

Terms

a(0) =3a(1) =4a(2) =7a(3) =8a(4) =11a(5) =15a(6) =19a(7) =20a(8) =23a(9) =24a(10) =31a(11) =35a(12) =39a(13) =40a(14) =43a(15) =47a(16) =51a(17) =52a(18) =55a(19) =56a(20) =59a(21) =67a(22) =68a(23) =71a(24) =79a(25) =83a(26) =84a(27) =87a(28) =88a(29) =91