id:A099631 - OEIS Search Results

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Numbers n such that (sigma[n-2]+sigma[n+2])/2 = sigma[n].

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5, 8, 32, 44, 116, 184, 356, 764, 815, 1004, 1012, 1205, 1338, 1345, 1436, 2636, 2876, 3126, 3644, 5156, 5305, 5804, 6236, 7192, 7542, 7556, 8564, 9356, 9404, 10196, 10362, 10904, 11276, 11876, 13436, 16375, 17564, 17636, 20156, 25316, 25964 (list; graph; listen)

	OFFSET	`1,1`
	EXAMPLE	`n=1004,{n-2,n+2}=1002,1006, sigma[1002]=2016,sigma[1006]=1512, sigma[1004]=(2016+1512)/2=1764`
	CROSSREFS	`Cf. A000203.` `Sequence in context: A049373 A002536 A068981 this_sequence A032790 A075273 A151349` `Adjacent sequences: A099628 A099629 A099630 this_sequence A099632 A099633 A099634`
	KEYWORD	`nonn`
	AUTHOR	`Labos E. (labos(AT)ana.sote.hu), Oct 26 2004`

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Last modified December 17 19:39 EST 2009. Contains 170821 sequences.

AT&T Labs Research