Order of 4 mod 4n+1.

Terms

a(0) =1a(1) =2a(2) =3a(3) =6a(4) =4a(5) =3a(6) =10a(7) =14a(8) =5a(9) =18a(10) =10a(11) =6a(12) =21a(13) =26a(14) =9a(15) =30a(16) =6a(17) =11a(18) =9a(19) =15a(20) =27a(21) =4a(22) =11a(23) =5a(24) =24a(25) =50a(26) =6a(27) =18a(28) =14a(29) =6