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A000173
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Unitary-sociable numbers (smallest member of each cycle).
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3
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30, 1482, 2418, 24180, 35238, 263820, 395730, 473298, 698130, 763620, 2212026, 2233554, 172459210, 209524210, 341354790, 384121920, 525150234, 530946330, 582129630, 1799281330, 2069510520, 2514290520, 3344596854, 5251502340
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OFFSET
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1,1
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COMMENTS
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If n=product p_i^a_i, d=product p_i^c_i is a unitary divisor of n if each c_i is 0 or a_i.
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REFERENCES
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R. K. Guy, Unsolved Problems in Number Theory, 3rd edition, Sect. B7.
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LINKS
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CROSSREFS
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KEYWORD
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nonn,nice
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AUTHOR
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EXTENSIONS
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More terms from Herman Jamke (hermanjamke(AT)fastmail.fm), Nov 01 2006
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STATUS
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approved
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