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A069589 as a simple table

n a(n)
1 3
2 31
3 307
4 3001
5 30011
6 300007
7 3000017
8 30000001
9 300000007
10 3000000019
11 30000000001
12 300000000077
13 3000000000013
14 30000000000011
15 300000000000089
16 3000000000000037
17 30000000000000029
18 300000000000000011
19 3000000000000000037
20 30000000000000000041

[3,31,307,3001,30011,300007,3000017,30000001,
 300000007,3000000019,30000000001,300000000077,
 3000000000013,30000000000011,300000000000089,
 3000000000000037,30000000000000029,
 300000000000000011,3000000000000000037,
 30000000000000000041]

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Last modified May 6 18:59 EDT 2024. Contains 372297 sequences. (Running on oeis4.)