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A080494 as a simple table

n a(n)
1 9
2 99
3 9009
4 900900
5 90090000
6 9009000000
7 900900000000
8 90090000000000
9 9009000000000000
10 900900000000000000
11 90090000000000000000
12 9009000000000000000000
13 900900000000000000000000 

[9,99,9009,900900,90090000,9009000000,
 900900000000,90090000000000,9009000000000000,
 900900000000000000,90090000000000000000,
 9009000000000000000000,900900000000000000000000]

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Last modified August 25 00:57 EDT 2024. Contains 375418 sequences. (Running on oeis4.)