Search: id:A076619
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%I A076619
%S A076619 3,3,4,7,3,7,11,7,6,4,15,3,7,11,23,16,7,8,11,27,7,15,31,22,3,35,7,16,
%T A076619 39,11,4,43,23,31,47,7,15,34,11,27,7,15,59,40,31,12,63,6,43,3,67,16,35,
%U A076619 71,7,22,75,31,39,52,79,11,7,83,43,14,58,87,36,23,31,47,95,22,7,15,67
%N A076619 Least x>1 such that x^d == 1 (mod d) for each divisor d of n ( for all 
               non-square-free numbers n cf. A013929).
%C A076619 If n is square-free (cf. A005117) : the least x>1 such that x^d == 1 
               (mod d) (for each divisor d of n) equals n+1
%F A076619 a(p^m)=p+1 for p prime and m>1
%Y A076619 Sequence in context: A152949 A058660 A059871 this_sequence A007448 A155689 
               A051263
%Y A076619 Adjacent sequences: A076616 A076617 A076618 this_sequence A076620 A076621 
               A076622
%K A076619 nonn
%O A076619 2,1
%A A076619 Benoit Cloitre (benoit7848c(AT)orange.fr), Oct 22 2002

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