Cycle length of applying XOR with the previous state and bit rotation on a string of n bits.

Terms

a(0) =3a(1) =6a(2) =15a(3) =12a(4) =255a(5) =30a(6) =63a(7) =24a(8) =315a(9) =510a(10) =33825a(11) =60a(12) =159783a(13) =126a(14) =255a(15) =48a(16) =65535a(17) =630a(18) =14942265a(19) =1020a(20) =4095a(21) =67650a(22) =4194303a(23) =120a(24) =17825775a(25) =319566a(26) =1310715a(27) =252a(28) =23353884759a(29) =510