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A099915 as a simple table

n a(n)
0 1
1 15
2 155
3 1555
4 15555
5 155555
6 1555555
7 15555555
8 155555555
9 1555555555
10 15555555555
11 155555555555
12 1555555555555
13 15555555555555
14 155555555555555
15 1555555555555555
16 15555555555555555
17 155555555555555555

[1,15,155,1555,15555,155555,1555555,15555555,
 155555555,1555555555,15555555555,155555555555,
 1555555555555,15555555555555,155555555555555,
 1555555555555555,15555555555555555,
 155555555555555555]

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Last modified February 24 11:15 EST 2024. Contains 370303 sequences. (Running on oeis4.)