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A156641 as a simple table

n a(n)
0 13
1 1313
2 131313
3 13131313
4 1313131313
5 131313131313
6 13131313131313
7 1313131313131313
8 131313131313131313
9 13131313131313131313
10 1313131313131313131313
11 131313131313131313131313 

[13,1313,131313,13131313,1313131313,131313131313,
 13131313131313,1313131313131313,
 131313131313131313,13131313131313131313,
 1313131313131313131313,131313131313131313131313]

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Last modified April 17 23:23 EDT 2024. Contains 371767 sequences. (Running on oeis4.)