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A053052 as a simple table

n a(n)
1 1
2 21
3 123
4 4321
5 12345
6 654321
7 1234567
8 87654321
9 123456789
10 10987654321
11 1234567891011
12 121110987654321
13 12345678910111213
14 1413121110987654321
15 123456789101112131415

[1,21,123,4321,12345,654321,1234567,87654321,
 123456789,10987654321,1234567891011,
 121110987654321,12345678910111213,
 1413121110987654321,123456789101112131415]

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Last modified July 28 14:04 EDT 2021. Contains 346334 sequences. (Running on oeis4.)