Smallest k such that k^3 == 1 (mod some n-th power), k > 1.

Terms

a(0) =2a(1) =4a(2) =9a(3) =17a(4) =33a(5) =65a(6) =129a(7) =257a(8) =513a(9) =1025a(10) =2049a(11) =4097a(12) =8193a(13) =16385a(14) =32769a(15) =65537a(16) =131073a(17) =262145a(18) =524289a(19) =1048577a(20) =2097153a(21) =4194305a(22) =8388609a(23) =16777217a(24) =33554433a(25) =67108865a(26) =134217729a(27) =268435457a(28) =536870913a(29) =1073741825