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A034967 Sum of digits of numbers between 0 and (10^n)-1. +0
9
0, 45, 900, 13500, 180000, 2250000, 27000000, 315000000, 3600000000, 40500000000, 450000000000, 4950000000000, 54000000000000, 585000000000000, 6300000000000000, 67500000000000000, 720000000000000000 (list; graph; listen)
OFFSET

0,2

FORMULA

a(n) = 45*n*10^(n-1)

CROSSREFS

Sequence in context: A024379 A134290 A078761 this_sequence A010961 A010997 A140346

Adjacent sequences: A034964 A034965 A034966 this_sequence A034968 A034969 A034970

KEYWORD

nonn,easy

AUTHOR

Felice Russo (felice.russo(AT)katamail.com )

EXTENSIONS

More terms from James A. Sellers (sellersj(AT)math.psu.edu), Jan 19 2000

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Last modified July 26 23:19 EDT 2008. Contains 142293 sequences.


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