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%I #7 Mar 31 2012 13:21:54
%S 0,1,2,3,4,5,6,0,3,6,2,5,1,4,0,2,4,6,1,3,5,0,6,5,4,3,2,1,0,4,1,5,2,6,
%T 3,0,5,3,1,6,4,2,0,1,2,3,4,5,6,0,3,6,2,5,1,4,0,2,4,6,1,3,5,0,6,5,4,3,
%U 2,1,0,4,1,5,2,6,3,0,5,3,1,6,4,2
%N Rectangular array read by rows: n-th row gives the 7 numbers k*10^n mod 7 for 0 <= k < 7.
%C Row n and rows n+6i are equal.
%e Array begins:
%e 0 1 2 3 4 5 6
%e 0 3 6 2 5 1 4
%e 0 2 4 6 1 3 5
%e 0 6 5 4 3 2 1
%e 0 4 1 5 2 6 3
%e 0 5 3 1 6 4 2
%e ...
%K nonn,easy,tabf
%O 1,3
%A _Jon Perry_, Jan 14 2003
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