%I A001148
%S A001148 1,3,9,7,1,3,9,7,1,3,9,7,1,3,9,7,1,3,9,7,1,3,9,7,1,3,9,
%T A001148 7,1,3,9,7,1,3,9,7,1,3,9,7,1,3,9,7,1,3,9,7,1,3,9,7,1,3,
%U A001148 9,7,1,3,9,7,1,3,9,7,1,3,9,7,1,3,9,7,1,3,9,7,1,3,9,7,1
%N A001148 Final digit of 3^n.
%C A001148 Let G = {1,3,7,9} ; Let the binary operator o be defined as: X o Y = 
               least significant digit of the product XY, where X,Y belong to G. 
               Then (G,o) is an Abelian group and 3 is a generator of this group. 
               [From Kailasam Viswanathan Iyer (kvi(AT)nitt.edu), Apr 19 2009]
%H A001148 <a href="Sindx_Fi.html#final">Index entries for sequences related to 
               final digits of numbers</a>
%o A001148 (Other) sage: [power_mod(3, n, 10)for n in xrange(0, 81)] # [From Zerinvary 
               Lajos (zerinvarylajos(AT)yahoo.com), Nov 24 2009]
%Y A001148 Sequence in context: A134693 A096948 A016676 this_sequence A011318 A046261 
               A074806
%Y A001148 Adjacent sequences: A001145 A001146 A001147 this_sequence A001149 A001150 
               A001151
%K A001148 nonn,new
%O A001148 0,2
%A A001148 N. J. A. Sloane (njas(AT)research.att.com).