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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 32 |
| 3 | 456 |
| 4 | 1987 |
| 5 | 23456 |
| 6 | 321987 |
| 7 | 4567891 |
| 8 | 98765432 |
| 9 | 123456789 |
| 10 | 1987654321 |
| 11 | 23456789123 |
| 12 | 654321987654 |
| 13 | 7891234567891 |
| 14 | 65432198765432 |
| 15 | 789123456789123 |
| 16 | 1987654321987654 |
| 17 | 23456789123456789 |
| 18 | 987654321987654321 |
[1,32,456,1987,23456,321987,4567891,98765432, 123456789,1987654321,23456789123,654321987654, 7891234567891,65432198765432,789123456789123, 1987654321987654,23456789123456789, 987654321987654321] |