Nimsum n + 23.

Terms

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