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A078221 as a simple table

n a(n)
1 1
2 3
3 9
4 99
5 9999
6 99999999
7 9999999999999999
8 99999999999999999999999999999999
9 9999999999999999999999999999999999999999999999999999999999999999 

[1,3,9,99,9999,99999999,9999999999999999,
 99999999999999999999999999999999,
 99999999999999999999999999999999999999999999999999\
 99999999999999]

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Last modified August 25 22:58 EDT 2024. Contains 375454 sequences. (Running on oeis4.)