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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 80 |
| 2 | 12096 |
| 3 | 2196480 |
| 4 | 435635200 |
| 5 | 91017658368 |
| 6 | 19681596211200 |
| 7 | 4361120388218880 |
| 8 | 984138122900275200 |
| 9 | 225245492144504832000 |
| 10 | 52138539404512009912320 |
| 11 | 12180522019129546663526400 |
| 12 | 2867511425916768698757021696 |
| 13 | 679455041354637369514813030400 |
| 14 | 161892954188496214335204360192000 |
[1,80,12096,2196480,435635200,91017658368, 19681596211200,4361120388218880, 984138122900275200,225245492144504832000, 52138539404512009912320, 12180522019129546663526400, 2867511425916768698757021696, 679455041354637369514813030400, 161892954188496214335204360192000] |