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A261322 as a simple table

n a(n)
1 21
2 31
3 41
4 51
5 61
6 71
7 81
8 91
9 421
10 931
11 3311
12 5111
13 5511
14 7711
15 8421
16 9731
17 9911
18 311111
19 444111
20 711111
21 777111
22 993311
23 8811111
24 51111111
25 55551111
26 91111111
27 93333311
28 99311111
29 99991111
30 441111111
31 6666611111
32 7111111111
33 9333311111
34 411111111111
35 555111111111
36 771111111111
37 777777111111
38 911111111111

[21,31,41,51,61,71,81,91,421,931,3311,5111,5511,
 7711,8421,9731,9911,311111,444111,711111,777111,
 993311,8811111,51111111,55551111,91111111,
 93333311,99311111,99991111,441111111,6666611111,
 7111111111,9333311111,411111111111,555111111111,
 771111111111,777777111111,911111111111]

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Last modified April 25 07:53 EDT 2024. Contains 371964 sequences. (Running on oeis4.)