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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 10 |
| 2 | 301 |
| 3 | 3020 |
| 4 | 90901 |
| 5 | 912030 |
| 6 | 27451801 |
| 7 | 275430040 |
| 8 | 8290353001 |
| 9 | 83178960050 |
| 10 | 2503659154501 |
| 11 | 25119770505060 |
| 12 | 756096774306301 |
| 13 | 7586087513568070 |
| 14 | 228338722181348401 |
| 15 | 2290973309327052080 |
| 16 | 68957538001992910801 |
| 17 | 691866353329256160090 |
| 18 | 20824948137879677713501 |
[1,10,301,3020,90901,912030,27451801,275430040, 8290353001,83178960050,2503659154501, 25119770505060,756096774306301,7586087513568070, 228338722181348401,2290973309327052080, 68957538001992910801,691866353329256160090, 20824948137879677713501] |