Discriminants of imaginary quadratic fields with class number 4 (negated).

Terms

a(0) =39a(1) =55a(2) =56a(3) =68a(4) =84a(5) =120a(6) =132a(7) =136a(8) =155a(9) =168a(10) =184a(11) =195a(12) =203a(13) =219a(14) =228a(15) =259a(16) =280a(17) =291a(18) =292a(19) =312a(20) =323a(21) =328a(22) =340a(23) =355a(24) =372a(25) =388a(26) =408a(27) =435a(28) =483a(29) =520