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%I #37 Apr 22 2015 16:04:57
%S 3,5,17,31,127,257,511,683,2047,2731,3277,3641,8191,43691,52429,61681,
%T 65537,85489,131071,174763,178481,233017,253241,256999,486737,524287,
%U 704093,838861,1016801,1082401,1657009,1838599,1965379,2304167,2796203,3033169,3303821
%N Numbers n such that game of n X n Button Madness need have no solution; this lists only the primitive elements of the set.
%C Primitive elements of A165740. - _Thomas Buchholz_, May 23 2014
%C _Andries E. Brouwer_ remarks that it can be shown that this sequence is infinite and contains A000668 > 7 and A019434. - _Thomas Buchholz_, May 23 2014
%H N. J. A. Sloane, <a href="/A007802/b007802.txt">Table of n, a(n) for n = 1..42</a> [Copied from Brouwer's MAD numbers web page]
%H Andries E. Brouwer, <a href="http://www.win.tue.nl/~aeb/ca/madness/mad.html">MAD numbers</a>
%Y Cf. A000668, A019434, A165740.
%K nonn
%O 1,1
%A Aart Blokhuis (aartb(AT)win.tue.nl), Mar 15 1996
%E More terms from _Andries E. Brouwer_, May 31 2002, Sep 10 2012
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