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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 2 |
| 3 | 5 |
| 4 | 14 |
| 5 | 24 |
| 6 | 123 |
| 7 | 249 |
| 8 | 134 |
| 9 | 2468 |
| 10 | 16679 |
| 11 | 56788 |
| 12 | 1228 |
| 13 | 2479 |
| 14 | 244467 |
| 15 | 4456899 |
| 16 | 3355677 |
| 17 | 12446799 |
| 18 | 3467778 |
| 19 | 112366779 |
| 20 | 12244566 |
| 21 | 222446667 |
| 22 | 1234456689 |
| 23 | 1333455669 |
| 24 | 112234447899 |
[1,1,2,5,14,24,123,249,134,2468,16679,56788,1228, 2479,244467,4456899,3355677,12446799,3467778, 112366779,12244566,222446667,1234456689, 1333455669,112234447899] |