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A068672 as a simple table

n a(n)
1 31
2 421
3 521
4 7321
5 84221
6 94321
7 147432221
8 18964332221
9 29149754433222221
10 38191297654433322222221
11 39191397654433332222221
12 63312115121097765544433333322222222221
13 743724181412109876655444433333322222222222221 

[31,421,521,7321,84221,94321,147432221,
 18964332221,29149754433222221,
 38191297654433322222221,39191397654433332222221,
 63312115121097765544433333322222222221,
 743724181412109876655444433333322222222222221]

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Last modified June 2 00:37 EDT 2024. Contains 373032 sequences. (Running on oeis4.)