id:A079631 - OEIS Search Results

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Number of k less than n such that floor(k^(1/3)) divides k.

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1, 2, 3, 4, 5, 6, 7, 8, 8, 9, 9, 10, 10, 11, 11, 12, 12, 13, 13, 14, 14, 15, 15, 16, 16, 17, 18, 18, 18, 19, 19, 19, 20, 20, 20, 21, 21, 21, 22, 22, 22, 23, 23, 23, 24, 24, 24, 25, 25, 25, 26, 26, 26, 27, 27, 27, 28, 28, 28, 29, 29, 29, 30, 31, 31, 31, 31, 32, 32, 32, 32, 33, 33 (list; graph; listen)

	OFFSET	`1,2`
	REFERENCES	`R. L. Graham, D. E. Knuth and O.Patashnick, "Concrete mathematics", second edition, Addison Wesley, pp. 74-76`
	FORMULA	`a(n)=floor(n/floor(n^(1/3)))+1/2floor(n^(1/3))^2+5/2floor(n^(1/3))-3`
	EXAMPLE	`a(1000)=172`
	CROSSREFS	`Sequence in context: A138718 A108922 A102670 this_sequence A160755 A017873 A128557` `Adjacent sequences: A079628 A079629 A079630 this_sequence A079632 A079633 A079634`
	KEYWORD	`nonn`
	AUTHOR	`Benoit Cloitre (benoit7848c(AT)orange.fr), Jan 30 2003`

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Last modified November 23 17:09 EST 2009. Contains 167438 sequences.

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