Search: id:A004169
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%I A004169
%S A004169 7,9,11,13,14,18,19,21,22,23,25,26,27,28,29,31,33,35,36,37,38,39,41,
%T A004169 42,43,44,45,46,47,49,50,52,53,54,55,56,57,58,59,61,62,63,65,66,67,
%U A004169 69,70,71,72,73,74,75
%N A004169 Values of n for which a regular polygon with n sides cannot be constructed 
               with ruler and compass.
%D A004169 A. H. Beiler, Recreations in the Theory of Numbers, Dover, NY, 1964, 
               p. 183.
%D A004169 C. F. Gauss, Disquisitiones Arithmeticae, 1801. English translation: 
               Yale University Press, New Haven, CT, 1966, p. 460.
%D A004169 B. L. van der Waerden, Modern Algebra. Unger, NY, 2nd ed., Vols. 1-2, 
               1953, Vol. 1, p. 187.
%H A004169 C. F. Gauss, <a href="http://134.76.163.65/servlet/digbib?template=view.html&id=38913&startpage=5&endpage=5&i\
               mage-path=http://134.76.176.141:80/cgi-bin/letgifsfly.cgi&image-subpath=1614&pagenumber=5&imageset-id=161\
               4">Disquisitiones Arithmeticae</a>, Lipsiae, 1801. Reprinted in C. 
               F. Gauss, <a href="http://134.76.163.65/agora_docs/38910TABLE_OF_CONTENTS.html">
               Werke</a>, 1863.
%Y A004169 Cf. A003401.
%Y A004169 Sequence in context: A108815 A161992 A167377 this_sequence A066669 A059808 
               A020742
%Y A004169 Adjacent sequences: A004166 A004167 A004168 this_sequence A004170 A004171 
               A004172
%K A004169 nonn,nice
%O A004169 1,1
%A A004169 N. J. A. Sloane (njas(AT)research.att.com), Branislav Kisacanin (bkisacan(AT)eecs.uic.edu)

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