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A107691 as a simple table

n a(n)
1 5
2 151
3 1151
4 1511
5 511111
6 1111151
7 115111111
8 1111115111
9 1115111111
10 1151111111
11 111111111511
12 111511111111
13 1111151111111
14 5111111111111
15 111111151111111
16 111151111111111
17 5111111111111111
18 111115111111111111111
19 1111111111111111111511 

[5,151,1151,1511,511111,1111151,115111111,
 1111115111,1115111111,1151111111,111111111511,
 111511111111,1111151111111,5111111111111,
 111111151111111,111151111111111,5111111111111111,
 111115111111111111111,1111111111111111111511]

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Last modified April 23 14:15 EDT 2024. Contains 371914 sequences. (Running on oeis4.)