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Search: id:A000477
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| A000477 |
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Related to the divisor function.
(Formerly M4973 N2135)
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+0
1
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| 1, 15, 76, 275, 720, 1666, 3440, 6129, 11250, 17545, 28896, 41405, 65072, 85950, 128960, 162996, 238545, 286995, 404600, 482160, 662112, 756470, 1042560
(list; graph; listen)
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OFFSET
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1,2
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REFERENCES
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N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
N. J. A. Sloane, A Handbook of Integer Sequences, Academic Press, 1973 (includes this sequence).
J. Touchard, On prime numbers and perfect numbers, Scripta Math., 129 (1953), 35-39.
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CROSSREFS
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Sequence in context: A051880 A007328 A049391 this_sequence A041430 A156941 A051423
Adjacent sequences: A000474 A000475 A000476 this_sequence A000478 A000479 A000480
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KEYWORD
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nonn
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AUTHOR
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N. J. A. Sloane (njas(AT)research.att.com).
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