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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 2472 |
| 3 | 160698 |
| 4 | 7774180 |
| 5 | 395048648 |
| 6 | 18249324844 |
| 7 | 823388675124 |
| 8 | 36434863806328 |
| 9 | 1581290354621990 |
| 10 | 67798532910326566 |
| 11 | 2875909547284496026 |
| 12 | 120928356106013525980 |
| 13 | 5048363049533029363882 |
| 14 | 209452214101799345516844 |
[0,2472,160698,7774180,395048648,18249324844, 823388675124,36434863806328,1581290354621990, 67798532910326566,2875909547284496026, 120928356106013525980,5048363049533029363882, 209452214101799345516844] |