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| n | a(n) |
|---|---|
| 1 | 12 |
| 2 | 144 |
| 3 | 1298 |
| 4 | 11637 |
| 5 | 107720 |
| 6 | 997264 |
| 7 | 9205575 |
| 8 | 84987637 |
| 9 | 784968276 |
| 10 | 7250191247 |
| 11 | 66962229085 |
| 12 | 618461917882 |
| 13 | 5712150826447 |
| 14 | 52757783396467 |
| 15 | 487273980078400 |
| 16 | 4500491954718670 |
| 17 | 41566823940472846 |
| 18 | 383913783539151670 |
[12,144,1298,11637,107720,997264,9205575,84987637, 784968276,7250191247,66962229085,618461917882, 5712150826447,52757783396467,487273980078400, 4500491954718670,41566823940472846, 383913783539151670] |