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A104389 as a simple table

n a(n)
1 4
2 6
3 9
4 99
5 111
6 4444
7 111111111
8 555555555555
9 9999999999999999
10 111111111111111111
11 444444444444444444
12 555555555555555555555
13 777777777777777777777777
14 333333333333333333333333333333333
15 444444444444444444444444444444444444

[4,6,9,99,111,4444,111111111,555555555555,
 9999999999999999,111111111111111111,
 444444444444444444,555555555555555555555,
 777777777777777777777777,
 333333333333333333333333333333333,
 444444444444444444444444444444444444]

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Last modified August 29 09:35 EDT 2024. Contains 375511 sequences. (Running on oeis4.)