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%I A078832
%S A078832 1,2,3,2,2,2,3,2,2,2,2,2,2,2,3,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,3,2,2,2,2,
%T A078832 2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,3,2,2,2,2,2,2,2,
%U A078832 2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2
%N A078832 Smallest prime contained as binary substring in binary representation 
               of n>1, a(1)=1.
%C A078832 a(n)<=3 and for n>1: a(n)>=2 and a(n)=3 iff n=2^k-1, k>1.
%Y A078832 Cf. A078833, A078826, A078822, A007088, A020639.
%Y A078832 Sequence in context: A078545 A111497 A097051 this_sequence A086410 A147561 
               A103266
%Y A078832 Adjacent sequences: A078829 A078830 A078831 this_sequence A078833 A078834 
               A078835
%K A078832 nonn,base
%O A078832 1,2
%A A078832 Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Dec 08 2002

    
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Last modified December 16 13:01 EST 2009. Contains 170825 sequences.


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