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%I #5 May 24 2012 12:17:18
%S 0,1,1,4,2,1,6,0,1,2,5,1,5,1,0,1,4,1,4,4,6,0,1,1,3,2,6,1,0,1,2,2,1,2,
%T 6,0,1,4,6,4,3,1,0,1,1,4,2,1,6,0,1,2,5,1,5,1,0,1,4,1,4,4,6,0,1,1,3,2,
%U 6,1,0,1,2,2,1,2,6,0,1,4,6,4,3,1,0,1,1,4,2,1,6,0,1,2,5,1,5,1,0,1,4,1,4,4,6
%N n^(n+1) mod 7.
%F a(n) = n^(n+1) mod 7 = A007778(n) mod 7.
%F Periodic with cycle consisting of first 42 terms: {0,1,1,4,2,1,6,0,1,2,5,1,5,1,0,1,4,1,4,4,6,0,1,1,3,2,6,1,0,1,2,2,1,2,6,0,1,4,6,4,3,1}.
%t Table[PowerMod[n,n+1,7],{n,0,120}] (* _Harvey P. Dale_, May 24 2012 *)
%Y Cf. A053879, A070472, A007778.
%K nonn
%O 0,4
%A _Zak Seidov_, Sep 24 2006, Sep 25 2006
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