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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 520 |
| 3 | 30837 |
| 4 | 1710994 |
| 5 | 96199260 |
| 6 | 5589631828 |
| 7 | 328979478088 |
| 8 | 19603705394914 |
| 9 | 1178814839256659 |
| 10 | 71387656909124036 |
| 11 | 4347717462205577512 |
| 12 | 266011573509307925450 |
| 13 | 16337878757403766119544 |
| 14 | 1006670823452543129707514 |
[0,520,30837,1710994,96199260,5589631828, 328979478088,19603705394914,1178814839256659, 71387656909124036,4347717462205577512, 266011573509307925450,16337878757403766119544, 1006670823452543129707514] |