%I
%S 2,1,3,4,7,11,18,9,7,16,3,19,2,1,3,4,7,11,18,9,7,16,3,19,2,1,3,4,7,11,
%T 18,9,7,16,3,19,2,1,3,4,7,11,18,9,7,16,3,19,2,1,3,4,7,11,18,9,7,16,3,
%U 19,2,1,3,4,7,11,18,9,7,16,3,19,2,1,3,4,7,11,18,9,7,16,3,19,2,1,3,4,7,11,18,9,7,16,3,19,2,1,3,4,7,11
%N Lucas numbers mod 20.
%C Sequence of period 12.
%C This is one of four sequences that are period 12 of the form Lucas[n] Mod x, where x is 8,10,20,40.
%H G. C. Greubel, <a href="/A268613/b268613.txt">Table of n, a(n) for n = 0..10000</a>
%F a(n+12) = a(n).
%t Table[Mod[LucasL[n],20],{n,0,100}]
%o (MAGMA) [Lucas(n) mod 20: n in [0..100]]; // _Vincenzo Librandi_, Feb 09 2016
%Y Cf. A000032, A111958, A130893.
%K nonn,easy
%O 0,1
%A _G. C. Greubel_, Feb 08 2016
