Search: id:A063072
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%I A063072
%S A063072 1,3,7,12,28,60,91,124,168,360,546,744,1170,2418,2880,4368,5952,9360,
%T A063072 19344,28800,39312,59520,79248,99944,112320,180048,203112,232128,
%U A063072 345600,471744,714240,950976,1199328,1451520,2160576,2437344,2926080
%N A063072 Sum of divisors of Ramanujan's highly composite numbers, or sigma(A002182(n)).
%H A063072 Harry J. Smith, <a href="b063072.txt">Table of n, a(n) for n=1,...,50</
               a>
%o A063072 (PARI) a=0; j=[]; for(n=1,200000,b=numdiv(n); if(b>a,a=b; j=concat(j, 
               sigma(n)))); j
%o A063072 (PARI) { n=a=0; for (m=1, 10^9, b=numdiv(m); if(b>a, a=b; write("b063072.txt", 
               n++, " ", sigma(m)); if (n==50, break)) ) } [From Harry J. Smith 
               (hjsmithh(AT)sbcglobal.net), Aug 16 2009]
%Y A063072 Cf. A000005, A004394, A002183, A002473, A000203.
%Y A063072 Sequence in context: A167491 A062325 A099811 this_sequence A007626 A047068 
               A167490
%Y A063072 Adjacent sequences: A063069 A063070 A063071 this_sequence A063073 A063074 
               A063075
%K A063072 easy,nonn
%O A063072 1,2
%A A063072 Jason Earls (zevi_35711(AT)yahoo.com), Aug 02 2001
%E A063072 More terms from Reiner Martin (reinermartin(AT)hotmail.com), Dec 22 2001

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