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A177090 as a simple table

n a(n)
0 0
1 12
2 1212
3 121212
4 12121212
5 1212121212
6 121212121212
7 12121212121212
8 1212121212121212
9 121212121212121212
10 12121212121212121212
11 1212121212121212121212
12 121212121212121212121212
13 12121212121212121212121212
14 1212121212121212121212121212 

[0,12,1212,121212,12121212,1212121212,
 121212121212,12121212121212,1212121212121212,
 121212121212121212,12121212121212121212,
 1212121212121212121212,121212121212121212121212,
 12121212121212121212121212,
 1212121212121212121212121212]

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Last modified May 6 05:18 EDT 2024. Contains 372290 sequences. (Running on oeis4.)