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Search: id:A048253
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| A048253 |
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Number of integers whose sum of divisors = 6^n. |
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+0
2
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| 1, 1, 5, 11, 18, 30, 48, 85, 148, 250, 415, 669, 1066, 1697
(list; graph; listen)
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OFFSET
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1,3
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EXAMPLE
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For n=3 Sigma[ 1,x ]=216 holds for 102,110,142,159 and 187, that is for 5 integers.
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CROSSREFS
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A006532, A020477, A019422, A019423, A018427, A048251, A048252.
Adjacent sequences: A048250 A048251 A048252 this_sequence A048254 A048255 A048256
Sequence in context: A080566 A094684 A140697 this_sequence A102174 A140515 A056996
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KEYWORD
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nonn
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AUTHOR
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Labos E. (labos(AT)ana.sote.hu)
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EXTENSIONS
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a(9)-a(14) from Donovan Johnson (donovan.johnson(AT)yahoo.com), Sep 02 2008
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