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| n | a(n) |
|---|---|
| 1 | 12 |
| 2 | 144 |
| 3 | 636 |
| 4 | 2809 |
| 5 | 17225 |
| 6 | 105625 |
| 7 | 571350 |
| 8 | 3090564 |
| 9 | 17518470 |
| 10 | 99301225 |
| 11 | 552967815 |
| 12 | 3079251081 |
| 13 | 17262695190 |
| 14 | 96776988100 |
| 15 | 541164386750 |
| 16 | 3026121180625 |
| 17 | 16938024328125 |
| 18 | 94806734765625 |
| 19 | 530464911052500 |
| 20 | 2968069964160016 |
[12,144,636,2809,17225,105625,571350,3090564, 17518470,99301225,552967815,3079251081, 17262695190,96776988100,541164386750, 3026121180625,16938024328125,94806734765625, 530464911052500,2968069964160016] |