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A058198 Where d(m) (number of divisors, A000005) has risen by at least n. 4
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; text; internal format)
OFFSET

1,1

REFERENCES

D. S. Mitrinovic et al., Handbook of Number Theory, Kluwer, 1996, Section II.1.3.a.

LINKS

T. D. Noe, Table of n, a(n) for n = 1..1004

EXAMPLE

d(11)=2, d(12)=6 gives first jump of >= 3, so a(3) = a(4) = 12.

PROG

(Haskell)

a058198 = (+ 1) . a058197  -- Reinhard Zumkeller, Feb 04 2013

CROSSREFS

Equals A058197(n) + 1.

Cf. A058199.

Sequence in context: A074385 A057340 A092427 * A096075 A278256 A066791

Adjacent sequences:  A058195 A058196 A058197 * A058199 A058200 A058201

KEYWORD

nonn,nice,easy

AUTHOR

N. J. A. Sloane, Nov 28 2000

EXTENSIONS

More terms from James A. Sellers, Nov 29 2000

STATUS

approved

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Last modified January 29 01:42 EST 2020. Contains 331328 sequences. (Running on oeis4.)