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A221156 as a simple table

n a(n)
0 1
1 13131
2 131311
3 13131131313
4 13131131313313133
5 1313113131331313313131131313
6 131311313133131331313113131331313313131131311
7 1313113131331313313131131313313133131311313113131331313113131131313313131 

[1,13131,131311,13131131313,13131131313313133,
 1313113131331313313131131313,
 131311313133131331313113131331313313131131311,
 13131131313313133131311313133131331313113131131313\
 31313113131131313313131]

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Last modified April 20 11:10 EDT 2024. Contains 371838 sequences. (Running on oeis4.)