A066558 a(n) = A066557(n)/n.
9, 49, 333, 2499, 19999, 166666, 1428571, 12499999, 111111111, 999999999, 9090909090, 83333333333, 769230769230, 7142857142857, 66666666666666, 624999999999999, 5882352941176470, 55555555555555555, 526315789473684210, 4999999999999999999, 47619047619047619047
Offset: 1
Links
- Harry J. Smith, Table of n, a(n) for n = 1..150
Programs
-
PARI
a(n) = { (10^n - 1)\n } \\ Harry J. Smith, Feb 22 2010
Formula
a(n) = floor((10^n-1)/n).
Extensions
More terms and formula from Francisco Salinas (franciscodesalinas(AT)hotmail.com), Dec 24 2001