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%I #6 Feb 18 2017 16:34:46
%S 0,1,1,1,1,9,49,121,65,329,913,25,2273,8169,16177,30905,16001,12937,
%T 116433,523609,1042465,2042153,1602161,6030841,12334529,10347465,
%U 26018321,32838297,27109217,512418409,316798385,703701817,2038349057,1165272329,10487450961
%N 9^n mod 2^n.
%H G. C. Greubel, <a href="/A138998/b138998.txt">Table of n, a(n) for n = 0..1000</a>
%t Table[Mod[9^n, 2^n], {n,0,50}] (* _G. C. Greubel_, Feb 18 2017 *)
%K nonn
%O 0,6
%A _N. J. A. Sloane_, May 20 2008
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