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A155885
as a simple table
n
a(n)
1
22
2
3233
3
424344
4
52535455
5
6263646566
6
727374757677
7
82838485868788
8
9293949596979899
[22,3233,424344,52535455,6263646566,727374757677, 82838485868788,9293949596979899]