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A002279 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.


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