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Search: id:A063831
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| A063831 |
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Sum of cubes of divisors is a square. |
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+0
1
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| 1, 2, 345, 690, 47196, 46248900, 53262468, 71315748, 140553735, 188194335, 215515727, 281107470, 288564647, 292978595, 310129096, 376388670, 431031454, 577129294, 585957190, 1474108335, 2133051720, 2489605188, 2948216670
(list; graph; listen)
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OFFSET
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1,2
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PROGRAM
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(PARI) for(n=1, 10^5, if(issquare(sigma(n, 3)), print(n)))
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CROSSREFS
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Cf. A001158.
Sequence in context: A057626 A063968 A064501 this_sequence A064023 A024350 A012669
Adjacent sequences: A063828 A063829 A063830 this_sequence A063832 A063833 A063834
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KEYWORD
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nonn
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AUTHOR
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Jason Earls (zevi_35711(AT)yahoo.com), Aug 21 2001
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EXTENSIONS
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More terms from Thomas Baruchel (baruchel(AT)users.sourceforge.net), Oct 20 2003
More terms from Sean A. Irvine (sairvin(AT)xtra.co.nz), Sep 24 2009
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