a(n) = Nim product 3 * n.

Terms

a(0) =0a(1) =3a(2) =1a(3) =2a(4) =12a(5) =15a(6) =13a(7) =14a(8) =4a(9) =7a(10) =5a(11) =6a(12) =8a(13) =11a(14) =9a(15) =10a(16) =48a(17) =51a(18) =49a(19) =50a(20) =60a(21) =63a(22) =61a(23) =62a(24) =52a(25) =55a(26) =53a(27) =54a(28) =56a(29) =59