Nimsum n + 17.

Terms

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