Least number m such that 3^m == +- 1 (mod 3n + 1).

Terms

a(0) =1a(1) =3a(2) =2a(3) =3a(4) =4a(5) =9a(6) =5a(7) =10a(8) =3a(9) =15a(10) =8a(11) =9a(12) =4a(13) =21a(14) =11a(15) =21a(16) =6a(17) =20a(18) =14a(19) =5a(20) =16a(21) =11a(22) =12a(23) =6a(24) =9a(25) =39a(26) =4a(27) =16a(28) =10a(29) =6