Search: id:A089389
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%I A089389
%S A089389 0,0,0,4,0,5,0,6,6,7,0,8,0,9,8,10,0,11,0,12,10,13,0,14,10,15,12,16,0,17,
%T A089389 0,18,14,19,12,20,0,21,16,22,0,23,0,24,18,25,0,26,14,27,20,28,0,29,16,
%U A089389 30,22,31,0,32,0,33,24,34,18,35,0,36,26,37,0,38,0,39,28,40,18,41,0,42
%N A089389 Sum of the smallest and the largest nontrivial divisor of n or 0 if n 
               is 1 or a prime.
%C A089389 The product of the smallest and the largest nontrivial divisor is n. 
               a(2m) = m+2, m >1.
%Y A089389 Sequence in context: A126836 A055241 A055242 this_sequence A081550 A046779 
               A051352
%Y A089389 Adjacent sequences: A089386 A089387 A089388 this_sequence A089390 A089391 
               A089392
%K A089389 easy,nonn
%O A089389 1,4
%A A089389 Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Nov 10 2003
%E A089389 More terms from David Wasserman (wasserma(AT)spawar.navy.mil), Sep 15 
               2005

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