From fundamental unit of Z[ (-n)^{1/4} ].

Terms

a(0) =1a(1) =-1a(2) =0a(3) =0a(4) =2a(5) =2a(6) =1a(7) =-66a(8) =-3a(9) =6a(10) =1a(11) =-10a(12) =-2a(13) =4a(14) =51a(15) =-1a(16) =11512a(17) =4956000a(18) =0a(19) =8a(20) =81146a(21) =1629810a(22) =-3a(23) =-281a(24) =-13a(25) =-126466a(26) =7a(27) =-39122a(28) =2218a(29) =217672