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A124166 100*(10^n-1)/9. 1

%I

%S 0,100,1100,11100,111100,1111100,11111100,111111100,1111111100,

%T 11111111100,111111111100,1111111111100,11111111111100,

%U 111111111111100,1111111111111100,11111111111111100,111111111111111100

%N 100*(10^n-1)/9.

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

%t Table[FromDigits[PadLeft[{0,0},n,1]],{n,2,20}] (* _Harvey P. Dale_, Jul 24 2012 *)

%K easy,nonn

%O 0,2

%A _Zerinvary Lajos_, Dec 02 2006

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Last modified September 22 16:17 EDT 2020. Contains 337291 sequences. (Running on oeis4.)