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 A053821 A discrete approximation to log(n): Sum_{ d divides n } A029833(d). 4
 0, 1, 1, 1, 2, 2, 2, 1, 1, 3, 2, 2, 3, 3, 3, 1, 3, 2, 3, 3, 3, 3, 3, 2, 2, 4, 1, 3, 3, 4, 3, 1, 3, 4, 4, 2, 4, 4, 4, 3, 4, 4, 4, 3, 3, 4, 4, 2, 2, 3, 4, 4, 4, 2, 4, 3, 4, 4, 4, 4, 4, 4, 3, 1, 5, 4, 4, 4, 4, 5, 4, 2, 4, 5, 3, 4, 4, 5, 4, 3, 1, 5, 4, 4, 5, 5, 4, 3, 4, 4, 5, 4, 4 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,5 COMMENTS For n >= 1, log(n) = Sum_{ d divides n } Lambda(d), where Lambda is the real Mangoldt function (see A029833). REFERENCES T. M. Apostol, Introduction to Analytic Number Theory, Springer-Verlag, 1976, page 32, Cf. Theorem 2.10. LINKS CROSSREFS Sequence in context: A206827 A098593 A144431 * A076545 A162246 A277447 Adjacent sequences:  A053818 A053819 A053820 * A053822 A053823 A053824 KEYWORD nonn,easy AUTHOR N. J. A. Sloane, Apr 08 2000 STATUS approved

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Last modified January 15 18:52 EST 2019. Contains 319170 sequences. (Running on oeis4.)