%I #10 Oct 22 2023 16:45:32
%S 1,4,5,7,6,3,2,3,8,35,12,16,11,30,13,7,4,63,33,23,18,60,27,78,10,60,
%T 12,49,16,105,27,12,14,119,40,55,12,88,34,10,12,116,75,51,39,48,20,28,
%U 3,36,89,24,30,189,12,65,4,90,66,35,53,28,48,56,6,77,92,78
%N Least number m such that 7^m == +- 1 (mod 7n + 1).
%K nonn
%O 1,2
%A _N. J. A. Sloane_