Nim product 4 * n.

Terms

a(0) =0a(1) =4a(2) =8a(3) =12a(4) =6a(5) =2a(6) =14a(7) =10a(8) =11a(9) =15a(10) =3a(11) =7a(12) =13a(13) =9a(14) =5a(15) =1a(16) =64a(17) =68a(18) =72a(19) =76a(20) =70a(21) =66a(22) =78a(23) =74a(24) =75a(25) =79a(26) =67a(27) =71a(28) =77a(29) =73