Search: id:A088167
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%I A088167
%S A088167 1,1,2,3,2,5,2,5,3,7,2,8,2,8,6,9,2,12,2,11,5,10,2,16,5,10,5,11,2,21,2,
%T A088167 15,6,12,8,19,2,14,4,24,2,21,2,18,11,15,2,28,3,23,5,17,2,24,11,24,6,17,
%U A088167 2,37,2,19,9,24,8,29,2,23,7,31,2,41,2,23,13,25,8,29,2,38,7,24,2,40
%N A088167 Number of earlier occurring divisors of n; a(1)=1.
%C A088167 a(n) = #{k: 1<=k<n & n mod a(k) = 0};
%C A088167 a(n)=2 iff n is an odd prime;
%C A088167 a(A088168(n))=n and a(k)<>n for k<A088168(n).
%Y A088167 Sequence in context: A073751 A108501 A166226 this_sequence A073893 A099552 
               A076199
%Y A088167 Adjacent sequences: A088164 A088165 A088166 this_sequence A088168 A088169 
               A088170
%K A088167 nonn
%O A088167 1,3
%A A088167 Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Sep 21 2003

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