Positive numbers of the form x^2+xy+5y^2 (discriminant -19).

Terms

a(0) =1a(1) =4a(2) =5a(3) =7a(4) =9a(5) =11a(6) =16a(7) =17a(8) =19a(9) =20a(10) =23a(11) =25a(12) =28a(13) =35a(14) =36a(15) =43a(16) =44a(17) =45a(18) =47a(19) =49a(20) =55a(21) =61a(22) =63a(23) =64a(24) =68a(25) =73a(26) =76a(27) =77a(28) =80a(29) =81