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A014361
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Aliquot sequence starting at 564.
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5
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564, 780, 1572, 2124, 3336, 5064, 7656, 13944, 26376, 49464, 88536, 187944, 295896, 443904, 812340, 1652304, 2767056, 4803888, 7914048, 13495104, 30725280, 79741440, 196505388, 300216656, 285162916, 237325596, 325831908, 434442572, 325831936, 347001764, 260735800, 434766560
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OFFSET
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0,1
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REFERENCES
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Richard K. Guy, Unsolved Problems in Number Theory, 3rd Edition, Springer, 2004, Section B6, pp. 92-95.
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LINKS
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FORMULA
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MATHEMATICA
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PROG
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(PARI) a(n, a=564)={for(i=1, n, a=sigma(a)-a); a} \\ M. F. Hasler, Feb 24 2018
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CROSSREFS
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Cf. A098007 (length of aliquot sequences); some other examples: A008885 (starting at 30) .. A008892 (starting at 276), A014360 (starting at 552) .. A014365 (starting at 1134), ..., A171103 (starting at 46758). See link to index for a more complete list.
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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