Search: id:A040017
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%I A040017
%S A040017 3,11,37,101,9091,9901,333667,909091,99990001,999999000001,
%T A040017 9999999900000001,909090909090909091,1111111111111111111,
%U A040017 11111111111111111111111,900900900900990990990991
%N A040017 Unique period primes (no other prime has same period as 1/p) in order 
               (periods are given in A051627).
%D A040017 J.-P. Delahaye, Merveilleux nombres premiers ("Amazing primes"), p. 324, 
               Pour la Science Paris 2000.
%H A040017 C. K. Caldwell, <a href="http://primes.utm.edu/glossary/page.php?sort=UniquePrime">
               Unique Primes</a>
%H A040017 <a href="Sindx_1.html#1overn">Index entries for sequences related to 
               decimal expansion of 1/n</a>
%H A040017 Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/
               UniquePrime.html">Unique Prime</a>
%H A040017 Wikipedia, <a href="http://en.wikipedia.org/wiki/Unique_prime">Unique 
               prime</a>
%e A040017 The decimal expansion of 1/101 is 0.00990099..., having a period of 4 
               and it is the only prime with that period.
%Y A040017 Cf. A007615 (same numbers ordered by period length)
%Y A040017 Cf. A007498, A040017, A002371, A048595, A006883, A007732, A051626, A051627.
%Y A040017 Sequence in context: A046107 A061075 A005422 this_sequence A007615 A065540 
               A084171
%Y A040017 Adjacent sequences: A040014 A040015 A040016 this_sequence A040018 A040019 
               A040020
%K A040017 nonn,base,easy,nice
%O A040017 1,1
%A A040017 Jud McCranie j.mccranie(AT)comcast.net

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