id:A079529 - OEIS Search Results

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sigma(n) - ceiling( n + sqrt n ) as n runs through the composite numbers A002808.

+0
2

1, 3, 4, 1, 4, 12, 6, 5, 11, 16, 17, 6, 9, 31, 1, 10, 7, 22, 36, 25, 9, 14, 7, 49, 15, 10, 43, 47, 33, 26, 19, 69, 1, 35, 13, 38, 58, 9, 56, 15, 24, 100, 26, 33, 55, 10, 69, 49, 18, 65, 114, 31, 40, 55, 10, 81, 97, 31, 34, 130, 13, 36, 23, 82, 134, 11, 66, 25, 40, 15, 146, 63, 47, 107 (list; graph; listen)

	OFFSET	`1,2`
	COMMENT	`It is known that a(n) >= 0.`
	REFERENCES	`D. S. Mitrinovic et al., Handbook of Number Theory, Kluwer, Section III.1.1.a.` `W. Sierpi\'{n}ski, Elementary Theory of Numbers. Pa\'{n}st. Wydaw. Nauk., Warsaw, 1964.`
	LINKS	`W. Sierpi\'{n}ski, Elementary Theory of Numbers, Warszawa 1964.`
	CROSSREFS	`Cf. A079528, A055682, A058208.` `Sequence in context: A105579 A124446 A091542 this_sequence A133779 A137911 A019599` `Adjacent sequences: A079526 A079527 A079528 this_sequence A079530 A079531 A079532`
	KEYWORD	`nonn`
	AUTHOR	`N. J. A. Sloane (njas(AT)research.att.com), Jan 22 2003`

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Last modified December 6 13:45 EST 2009. Contains 170429 sequences.

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