Nimsum n + 12.

Terms

a(0) =12a(1) =13a(2) =14a(3) =15a(4) =8a(5) =9a(6) =10a(7) =11a(8) =4a(9) =5a(10) =6a(11) =7a(12) =0a(13) =1a(14) =2a(15) =3a(16) =28a(17) =29a(18) =30a(19) =31a(20) =24a(21) =25a(22) =26a(23) =27a(24) =20a(25) =21a(26) =22a(27) =23a(28) =16a(29) =17