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Search: id:A054005
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| A054005 |
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Sum of divisors of n and n+1 which have the same number and sum of divisors. |
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+0
4
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| 24, 2160, 2640, 4320, 51840, 65280, 115200, 138240, 194400, 186048, 276480, 483840, 622080, 700416, 950400, 984960, 1118880, 1128960, 1612800, 2661120, 3937248, 3617280, 5019840, 6128640, 5806080, 7375680, 8467200, 11583936
(list; graph; listen)
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OFFSET
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1,1
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FORMULA
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a(n) = sigma(A054004(n))
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EXAMPLE
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See example in A054004.
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CROSSREFS
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Cf. A000005, A000203, A002961, A005237, A053249, A054004, A054006, A054007.
Sequence in context: A002671 A003738 A001501 this_sequence A107675 A008977 A159392
Adjacent sequences: A054002 A054003 A054004 this_sequence A054006 A054007 A054008
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KEYWORD
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nonn
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AUTHOR
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Asher Auel (asher.auel(AT)reed.edu) Jan 12, 2000
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EXTENSIONS
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More terms from Jud McCranie (j.mccranie(AT)comcast.net), Oct 15 2000
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