Shortest representation of -n in 2's-complement format.

Terms

a(0) =1a(1) =2a(2) =5a(3) =4a(4) =11a(5) =10a(6) =9a(7) =8a(8) =23a(9) =22a(10) =21a(11) =20a(12) =19a(13) =18a(14) =17a(15) =16a(16) =47a(17) =46a(18) =45a(19) =44a(20) =43a(21) =42a(22) =41a(23) =40a(24) =39a(25) =38a(26) =37a(27) =36a(28) =35a(29) =34