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| n | a(n) |
|---|---|
| 1 | 9 |
| 2 | 121 |
| 3 | 1665 |
| 4 | 22979 |
| 5 | 317259 |
| 6 | 4380445 |
| 7 | 60481881 |
| 8 | 835088891 |
| 9 | 11530288395 |
| 10 | 159201677509 |
| 11 | 2198138788809 |
| 12 | 30350271502115 |
| 13 | 419054058355851 |
| 14 | 5785987905016141 |
| 15 | 79888633386248025 |
| 16 | 1103043049708026539 |
| 17 | 15230001039404897259 |
| 18 | 210284568423392013685 |
| 19 | 2903453493049800669321 |
[9,121,1665,22979,317259,4380445,60481881, 835088891,11530288395,159201677509,2198138788809, 30350271502115,419054058355851,5785987905016141, 79888633386248025,1103043049708026539, 15230001039404897259,210284568423392013685, 2903453493049800669321] |