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Search: id:A063891
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| 1631, 2016, 8928, 11808, 36576, 45360, 1486080, 2359008, 3093552, 37748448
(list; graph; listen)
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OFFSET
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1,1
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PROGRAM
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(PARI) u(n) = sumdiv(n, d, if(gcd(d, n/d)==1, d)); z(n)=sigma(n)-u(n) for(n=1, 10^8, if(z(u(n))==2*n, print(n)))
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CROSSREFS
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Cf. A000203, A034448, A048146, A019284, A063885.
Sequence in context: A022060 A107524 A097225 this_sequence A072409 A052455 A054808
Adjacent sequences: A063888 A063889 A063890 this_sequence A063892 A063893 A063894
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KEYWORD
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more,nonn
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AUTHOR
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Jason Earls (zevi_35711(AT)yahoo.com), Aug 28 2001
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EXTENSIONS
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More terms from Thomas Baruchel (baruchel(AT)users.sourceforge.net), Oct 22 2003
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