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A030990 as a simple table

n a(n)
1 3
2 43
3 143
4 7143
5 57143
6 857143
7 2857143
8 42857143
9 142857143
10 7142857143
11 57142857143
12 857142857143
13 2857142857143
14 42857142857143
15 142857142857143
16 7142857142857143
17 57142857142857143

[3,43,143,7143,57143,857143,2857143,42857143,
 142857143,7142857143,57142857143,857142857143,
 2857142857143,42857142857143,142857142857143,
 7142857142857143,57142857142857143]

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Last modified December 9 08:20 EST 2019. Contains 329877 sequences. (Running on oeis4.)