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A040017 as a simple table

n a(n)
1 3
2 11
3 37
4 101
5 9091
6 9901
7 333667
8 909091
9 99990001
10 999999000001
11 9999999900000001
12 909090909090909091
13 1111111111111111111
14 11111111111111111111111
15 900900900900990990990991
16 909090909090909090909090909091

[3,11,37,101,9091,9901,333667,909091,99990001,
 999999000001,9999999900000001,909090909090909091,
 1111111111111111111,11111111111111111111111,
 900900900900990990990991,
 909090909090909090909090909091]

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Last modified March 28 20:05 EDT 2024. Contains 371254 sequences. (Running on oeis4.)