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%I #15 Apr 03 2020 01:19:32
%S 0,6,26,12,28,32,1,18,52,34,31,38,39,7,54,24,49,58,16,40,27,37,15,44,
%T 56,45,8,13,68,60,11,30,57,55,29,64,20,22,65,46,25,33,48,43,10,21,9,
%U 50,2,62,5,51,23,14,59,19,42,4,3,66,69,17,53,36,67,63,47,61,41,35
%N Log base 7 (n) mod 71.
%D I. M. Vinogradov, Elements of Number Theory, p. 224
%H I. M. Vinogradov, <a href="https://isidore.co/calibre/get/pdf/4459">Elements of Number Theory</a>, Translation of 5th revised edition, Dover Publications Inc., 1954, p. 224.
%F Row n=20 of T(n,k) in A054503. - _Georg Fischer_, Jan 19 2020
%t a[1]=0; a[n_]:=MultiplicativeOrder[7, 71, {n}]; Array[a, 70] (* _Vincenzo Librandi_, Apr 03 2020 *)
%Y Cf. A054503.
%K nonn,fini,full
%O 1,2
%A _N. J. A. Sloane_
%E a(60)-a(71) from _Georg Fischer_, Jan 19 2020
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