Least number m such that 7^m == +- 1 (mod 7n + 1).

Terms

a(0) =1a(1) =4a(2) =5a(3) =7a(4) =6a(5) =3a(6) =2a(7) =3a(8) =8a(9) =35a(10) =12a(11) =16a(12) =11a(13) =30a(14) =13a(15) =7a(16) =4a(17) =63a(18) =33a(19) =23a(20) =18a(21) =60a(22) =27a(23) =78a(24) =10a(25) =60a(26) =12a(27) =49a(28) =16a(29) =105