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A048400 as a simple table

n a(n)
1 2
2 3
3 5
4 7
5 41
6 47
7 14741
8 14747
9 74747
10 1414741
11 1474141
12 7414741
13 4141414747
14 4147414147
15 14141414141
16 14141414741
17 14141474741
18 14141474747
19 14147414741
20 14147474141
21 14147474147
22 14741414747
23 74141414147
24 74141414741
25 74147414741
26 74741474741
27 74747414141

[2,3,5,7,41,47,14741,14747,74747,1414741,1474141,
 7414741,4141414747,4147414147,14141414141,
 14141414741,14141474741,14141474747,14147414741,
 14147474141,14147474147,14741414747,74141414147,
 74141414741,74147414741,74741474741,74747414141]

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Last modified April 24 00:30 EDT 2024. Contains 371917 sequences. (Running on oeis4.)