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Search: id:A058198
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| A058198 |
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Where d(m) (number of divisors, A000005) has risen by at least n. |
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+0
3
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| 2, 6, 12, 12, 24, 24, 48, 48, 60, 60, 120, 120, 168, 168, 180, 180, 240, 240, 360, 360, 360, 360, 720, 720, 720, 720, 720, 720, 840, 840, 1260, 1260, 1260, 1260, 1680, 1680, 2520, 2520, 2520, 2520, 2520, 2520, 2520, 2520, 3360, 3360, 5040, 5040, 5040, 5040
(list; graph; listen)
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OFFSET
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1,1
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REFERENCES
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D. S. Mitrinovic et al., Handbook of Number Theory, Kluwer, 1996, Section II.1.3.a.
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EXAMPLE
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d(11)=2, d(12)=6 gives first jump of >= 3, so a(3)=a(4)=12.
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CROSSREFS
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Equals A058197(n)+1.
Sequence in context: A074385 A057340 A092427 this_sequence A096075 A066791 A062723
Adjacent sequences: A058195 A058196 A058197 this_sequence A058199 A058200 A058201
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KEYWORD
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nonn,nice,easy
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AUTHOR
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N. J. A. Sloane (njas(AT)research.att.com), Nov 28 2000
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EXTENSIONS
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More terms from James A. Sellers (sellersj(AT)math.psu.edu), Nov 29 2000
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