Search: id:A017685
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%I A017685
%S A017685 1,2049,177148,4196353,48828126,30248021,1977326744,8594130945,
%T A017685 31381236757,50024415087,285311670612,185843885311,1792160394038,
%U A017685 506442812307,2883268288216,17600780175361,34271896307634
%N A017685 Numerator of sum of -11 th powers of divisors of n.
%C A017685 Sum_{d|n} 1/d^k is equal to sigma_k(n)/n^k. So sequences A017665-A017712 
               also give the numerators and denominators of sigma_k(n)/n^k for k 
               = 1..24. The power sums sigma_k(n) are in sequences A000203 (k=1), 
               A001157-A001160 (k=2,3,4,5), A013954-A013972 for k = 6,7,...,24. 
               - comment from Ahmed Fares (ahmedfares(AT)my-deja.com), Apr 05 2001.
%Y A017685 Cf. A017686.
%Y A017685 Sequence in context: A017555 A071116 A060949 this_sequence A013959 A036089 
               A123095
%Y A017685 Adjacent sequences: A017682 A017683 A017684 this_sequence A017686 A017687 
               A017688
%K A017685 nonn,frac
%O A017685 1,2
%A A017685 N. J. A. Sloane (njas(AT)research.att.com).

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