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%I #9 Sep 08 2022 08:45:33
%S 0,1,1,25,161,681,3057,15225,55105,233801,269201,3471385,1882337,
%T 50495465,186023729,63600825,3793632897,12667859593,28111390417,
%U 253002513753,352877275169,3175895476521,15388919755377,68131533620729,120602593342913,240998409954249
%N 9^n mod 4^n.
%H Vincenzo Librandi, <a href="/A139729/b139729.txt">Table of n, a(n) for n = 0..1000</a>
%o (Magma) [9^n mod 4^n: n in [0..35]]; // _Vincenzo Librandi_, Jun 03 2011
%K nonn
%O 0,4
%A _N. J. A. Sloane_, May 20 2008
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