id:A002279 - OEIS Search Results

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5(10^n - 1)/9.

+0
6

0, 5, 55, 555, 5555, 55555, 555555, 5555555, 55555555, 555555555, 5555555555, 55555555555, 555555555555, 5555555555555, 55555555555555, 555555555555555, 5555555555555555, 55555555555555555 (list; graph; listen)

	OFFSET	`0,2`
	COMMENT	`Arithmetic mean of all n-digit odd numbers. E.g. a(2) = A.M. of {11,13,15,...97,99} = (11+99)/2 =55. - Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Aug 02 2005`
	CROSSREFS	`Adjacent sequences: A002276 A002277 A002278 this_sequence A002280 A002281 A002282` `Sequence in context: A045640 A043040 A062183 this_sequence A119292 A139258 A102312`
	KEYWORD	`easy,nonn`
	AUTHOR	`njas`

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Last modified October 12 15:26 EDT 2008. Contains 144830 sequences.

AT&T Labs Research