Base 2i representation of negative integers.

Terms

a(0) =103a(1) =102a(2) =101a(3) =100a(4) =203a(5) =202a(6) =201a(7) =200a(8) =303a(9) =302a(10) =301a(11) =300a(12) =1030003a(13) =1030002a(14) =1030001a(15) =1030000a(16) =1030103a(17) =1030102a(18) =1030101a(19) =1030100a(20) =1030203a(21) =1030202a(22) =1030201a(23) =1030200a(24) =1030303a(25) =1030302a(26) =1030301a(27) =1030300a(28) =1020003a(29) =1020002