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%I #12 Sep 08 2022 08:44:50
%S 0,1,1,5,1,21,9,45,225,357,761,1757,2641,5013,489,18829,28609,11973,
%T 59865,37181,185905,929525,2550473,4363757,13430177,42021,33764537,
%U 34604957,38807057,194035285,433305513
%N a(n) = 5^n mod 2^n.
%H Vincenzo Librandi, <a href="/A029757/b029757.txt">Table of n, a(n) for n = 0..240</a>
%p a:=n->5^n mod(2^(n)): seq(a(n), n=0..33); # _Zerinvary Lajos_, Feb 15 2008
%o (PARI) A029757(n) = lift(Mod(5^n,2^n)) \\ _Michael B. Porter_, Feb 02 2010
%o (Magma) [5^n mod 2^n: n in [0..80]]; // _Vincenzo Librandi_, Apr 25 2011
%K nonn,easy
%O 0,4
%A _N. J. A. Sloane_