Order of 3 mod 3n+1.

Terms

a(0) =1a(1) =2a(2) =6a(3) =4a(4) =3a(5) =4a(6) =18a(7) =5a(8) =20a(9) =6a(10) =30a(11) =16a(12) =18a(13) =4a(14) =42a(15) =11a(16) =42a(17) =6a(18) =20a(19) =28a(20) =10a(21) =16a(22) =22a(23) =12a(24) =12a(25) =18a(26) =78a(27) =8a(28) =16a(29) =10