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A064617 as a simple table

na(n)
19
298
3987
49876
598765
6987654
79876543
898765432
9987654321
109876543210
1198765432099
12987654320988
139876543209877
1498765432098766
15987654320987655
169876543209876544
1798765432098765433
18987654320987654322
199876543209876543211
2098765432098765432100
21987654320987654320989

[9,98,987,9876,98765,987654,9876543,98765432,
 987654321,9876543210,98765432099,987654320988,
 9876543209877,98765432098766,987654320987655,
 9876543209876544,98765432098765433,
 987654320987654322,9876543209876543211,
 98765432098765432100,987654320987654320989]