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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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2
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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; refs; listen; history; internal format)
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OFFSET
| 1,1
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REFERENCES
| D. S. Mitrinovic et al., Handbook of Number Theory, Kluwer, 1996, Section II.1.3.a.
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EXAMPLE
| d(11)=2, d(12)=6 gives first jump of >= 3, so a(3)=a(4)=12.
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CROSSREFS
| Equals A058197(n)+1.
Sequence in context: A074385 A057340 A092427 * A096075 A066791 A062723
Adjacent sequences: A058195 A058196 A058197 * A058199 A058200 A058201
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KEYWORD
| nonn,nice,easy
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com), Nov 28 2000
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EXTENSIONS
| More terms from James A. Sellers (sellersj(AT)math.psu.edu), Nov 29 2000
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