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Search: id:A058199
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| A058199 |
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Where d(m) (number of divisors, A000005) falls by at least n. |
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+0
1
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| 4, 6, 12, 12, 24, 30, 36, 60, 60, 60, 120, 120, 120, 180, 180, 180, 240, 240, 360, 360, 360, 420, 720, 720, 720, 720, 840, 840, 840, 1260, 1260, 1260, 1680, 1680, 1680, 1680, 1680, 2160, 2520, 2520, 2520, 2520, 2520, 2520, 2520, 2520, 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(12)=6, d(13)=2 gives first drop of >= 3, so a(3)=a(4)=12.
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CROSSREFS
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Cf. A000005, A058197, A058198.
Sequence in context: A074162 A038040 A058270 this_sequence A110178 A140599 A047406
Adjacent sequences: A058196 A058197 A058198 this_sequence A058200 A058201 A058202
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KEYWORD
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nonn,nice,easy
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AUTHOR
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njas, 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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