Generalized nim sum n + n in base 12.

Terms

a(0) =0a(1) =2a(2) =4a(3) =6a(4) =8a(5) =10a(6) =0a(7) =2a(8) =4a(9) =6a(10) =8a(11) =10a(12) =24a(13) =26a(14) =28a(15) =30a(16) =32a(17) =34a(18) =24a(19) =26a(20) =28a(21) =30a(22) =32a(23) =34a(24) =48a(25) =50a(26) =52a(27) =54a(28) =56a(29) =58