Search: id:A007624
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%I A007624 M4824
%S A007624 12,18,20,24,28,30,32,40,42,44,45,48,50,52,54,56,60,63,66,68,70,72,75,
%T A007624 76,78,80,84,88,90,92,96,98,99,102,104,105,108,110,112,114,116,117,120,
%U A007624 124,126,128,130,132,135,136,138,140,147,148,150,152,153,154
%N A007624 Product of proper divisors of n = n^k, k>1.
%D A007624 N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, 
               Academic Press, 1995 (includes this sequence).
%D A007624 A. H. Beiler, Recreations in the Theory of Numbers, Dover, NY, 1964, 
               p. 23.
%F A007624 d(n) >= 4 and even.
%Y A007624 Sequence in context: A077294 A025491 A091196 this_sequence A036456 A102467 
               A126706
%Y A007624 Adjacent sequences: A007621 A007622 A007623 this_sequence A007625 A007626 
               A007627
%K A007624 nonn
%O A007624 1,1
%A A007624 N. J. A. Sloane (njas(AT)research.att.com), Robert G. Wilson v (rgwv(AT)rgwv.com), 
               Mira Bernstein (mira(AT)math.berkeley.edu)

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