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A048253
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Number of integers whose sum of divisors = 6^n.
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4
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1, 1, 1, 5, 11, 18, 30, 48, 85, 148, 250, 415, 669, 1066, 1697, 2635, 4036, 6111, 9137, 13540, 19930, 29098, 42184, 60655, 86598, 122821, 173314, 243469, 340329, 473221, 654779, 901741, 1236668, 1689322, 2298592, 3115200, 4206016, 5658677, 7588039
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,4
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LINKS
| Ray Chandler, Table of n, a(n) for n=0..1000
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EXAMPLE
| 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
| Cf. A006532, A020477, A019422, A019423, A018427, A048251-A048256.
Sequence in context: A080566 A094684 A140697 * A102174 A140515 A056996
Adjacent sequences: A048250 A048251 A048252 * A048254 A048255 A048256
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KEYWORD
| nonn
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AUTHOR
| Labos E. (labos(AT)ana.sote.hu)
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EXTENSIONS
| a(9)-a(14) from Donovan Johnson (donovan.johnson(AT)yahoo.com), Sep 02 2008
Edited and extended by Ray Chandler (rayjchandler(AT)sbcglobal.net), Sep 01 2010
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