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Search: id:A001148
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| 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, 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, 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
(list; graph; listen)
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OFFSET
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0,2
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COMMENT
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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]
3^n mod 10 and 3^n mod 20. [From Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), Nov 25 2009]
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LINKS
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Index entries for sequences related to final digits of numbers
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PROGRAM
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(Other) sage: [power_mod(3, n, 10)for n in xrange(0, 81)] # [From Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), Nov 24 2009]
(Other) sage: [power_mod(3, n, 20)for n in xrange(0, 81)] [From Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), Nov 25 2009]
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CROSSREFS
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Sequence in context: A134693 A096948 A016676 this_sequence A011318 A046261 A074806
Adjacent sequences: A001145 A001146 A001147 this_sequence A001149 A001150 A001151
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KEYWORD
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nonn,new
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AUTHOR
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N. J. A. Sloane (njas(AT)research.att.com).
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