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A124167 10*(10^n-1). 0
0, 90, 990, 9990, 99990, 999990, 9999990, 99999990, 999999990, 9999999990, 99999999990, 999999999990, 9999999999990, 99999999999990, 999999999999990, 9999999999999990, 99999999999999990, 999999999999999990 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

COMMENTS

Equals 10*A002283. Partial sums give 10*A099676.

LINKS

Table of n, a(n) for n=0..17.

MAPLE

a:=n->sum (10^(n-j+2)-10^(n-j+1), j=0..n): seq(a(n), n=0..28);

CROSSREFS

Sequence in context: A101243 A173483 A202960 * A223364 A048548 A013427

Adjacent sequences:  A124164 A124165 A124166 * A124168 A124169 A124170

KEYWORD

easy,nonn

AUTHOR

Zerinvary Lajos, Dec 02 2006

STATUS

approved

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Last modified November 24 10:09 EST 2014. Contains 249882 sequences.