Search: id:A054603
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%I A054603
%S A054603 0,4,24,96,280,660,1344,2464,4176,6660,10120,14784,20904,28756,
%T A054603 38640,50880,65824,83844,105336,130720,160440,194964,234784,280416,
%U A054603 332400,391300,457704,532224,615496,708180,810960,924544,1049664
%N A054603 Sum_{d|4} phi(d)*n^(4/d).
%F A054603 a(n) = n^4+n^2+2n.
%Y A054603 Sequence in context: A026952 A009769 A119878 this_sequence A100381 A091143 
               A119920
%Y A054603 Adjacent sequences: A054600 A054601 A054602 this_sequence A054604 A054605 
               A054606
%K A054603 nonn
%O A054603 0,2
%A A054603 N. J. A. Sloane (njas(AT)research.att.com), Apr 16 2000

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