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1/1 = sum (9^i/10^(i+1)), i >= 0,
1/91 = sum (9^i/100^(i+1)), i >= 0, (this sequence)
1/991 = sum (9^i/1000^(i+1)), i >= 0,
1/9991 = sum (9^i/1000^(i+1)), i >= 0, ... - Daniel Forgues, Oct 28 2011
Table of n, a(n) for n=0..98.
Sequence in context: A011228 A175572 A263984 * A090998 A163930 A157371
Adjacent sequences: A021092 A021093 A021094 * A021096 A021097 A021098
N. J. A. Sloane.