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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 1 |
| 2 | 2 |
| 3 | 21 |
| 4 | 31 |
| 5 | 32 |
| 6 | 321 |
| 7 | 421 |
| 8 | 431 |
| 9 | 432 |
| 10 | 4321 |
| 11 | 5321 |
| 12 | 5421 |
| 13 | 5431 |
| 14 | 5432 |
| 15 | 54321 |
| 16 | 64321 |
| 17 | 65321 |
| 18 | 65421 |
| 19 | 65431 |
| 20 | 65432 |
| 21 | 654321 |
| 22 | 754321 |
| 23 | 764321 |
| 24 | 765321 |
| 25 | 765421 |
| 26 | 765431 |
| 27 | 765432 |
| 28 | 7654321 |
| 29 | 8654321 |
| 30 | 8754321 |
| 31 | 8764321 |
| 32 | 8765321 |
| 33 | 8765421 |
| 34 | 8765431 |
| 35 | 8765432 |
[0,1,2,21,31,32,321,421,431,432,4321,5321,5421, 5431,5432,54321,64321,65321,65421,65431,65432, 654321,754321,764321,765321,765421,765431,765432, 7654321,8654321,8754321,8764321,8765321,8765421, 8765431,8765432] |