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A033176 as a simple table

n a(n)
1 31
2 31331
3 313313331
4 31331333133331
5 31331333133331333331
6 313313331333313333313333331
7 31331333133331333331333333133333331
8 31331333133331333331333333133333331333333331

[31,31331,313313331,31331333133331,
 31331333133331333331,313313331333313333313333331,
 31331333133331333331333333133333331,
 31331333133331333331333333133333331333333331]

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Last modified July 26 20:17 EDT 2021. Contains 346294 sequences. (Running on oeis4.)