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n^((p-1)/2) (mod p) for p = 29.
2

%I #20 Mar 21 2013 16:21:18

%S 0,1,28,28,1,1,1,1,28,1,28,28,28,1,28,28,1,28,28,28,1,28,1,1,1,1,28,

%T 28,1,0,1,28,28,1,1,1,1,28,1,28,28,28,1,28,28,1,28,28,28,1,28,1,1,1,1,

%U 28,28,1,0,1,28,28,1,1,1,1,28,1,28,28,28,1,28,28,1,28

%N n^((p-1)/2) (mod p) for p = 29.

%t p = 29; Table[PowerMod[n, (p-1)/2, p], {n, 0, 100}]

%Y Cf. A186293-A186304.

%K nonn

%O 0,3

%A _Marco Matosic_, Feb 17 2011