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A317824 as a simple table

n a(n)
1 1
2 21
3 721
4 8721
5 8721
6 708721
7 5708721
8 65708721
9 165708721
10 65165708721
11 1165165708721
12 861165165708721
13 5861165165708721
14 5005861165165708721
15 55005861165165708721
16 48055005861165165708721
17 8448055005861165165708721
18 388448055005861165165708721
19 49388448055005861165165708721 

[1,21,721,8721,8721,708721,5708721,65708721,
 165708721,65165708721,1165165708721,
 861165165708721,5861165165708721,
 5005861165165708721,55005861165165708721,
 48055005861165165708721,8448055005861165165708721,
 388448055005861165165708721,
 49388448055005861165165708721]

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Last modified June 11 00:20 EDT 2024. Contains 373283 sequences. (Running on oeis4.)