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A078251 as a simple table

n a(n)
1 0
2 222
3 0
4 444444
5 55
6 666666
7 7777777777777777
8 888888888888888888
9 9999999999999999999999
10 1010101010101010101010101010
11 111111111111111111111111111111
12 121212
13 1313131313 

[0,222,0,444444,55,666666,7777777777777777,
 888888888888888888,9999999999999999999999,
 1010101010101010101010101010,
 111111111111111111111111111111,121212,1313131313]

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Last modified August 20 10:34 EDT 2024. Contains 375325 sequences. (Running on oeis4.)