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| n | a(n) |
|---|---|
| 0 | 2 |
| 1 | 4 |
| 2 | 12 |
| 3 | 100 |
| 4 | 2548 |
| 5 | 407044 |
| 6 | 106023164 |
| 7 | 136765353124 |
| 8 | 399090759725236 |
| 9 | 4445098474836287524 |
| 10 | 151287513513627682258436 |
| 11 | 12698799587219706700017036196 |
| 12 | 3463928752077516667634331415766516 |
| 13 | 2591202267595530693505786197581910681796 |
[2,4,12,100,2548,407044,106023164,136765353124, 399090759725236,4445098474836287524, 151287513513627682258436, 12698799587219706700017036196, 3463928752077516667634331415766516, 2591202267595530693505786197581910681796] |