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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 1 |
| 2 | 1 |
| 3 | 521 |
| 4 | 9299 |
| 5 | 350368 |
| 6 | 8398593 |
| 7 | 222485869 |
| 8 | 5541334459 |
| 9 | 140076298669 |
| 10 | 3556982106479 |
| 11 | 91815282711883 |
| 12 | 2417687110590928 |
| 13 | 65153661912489687 |
| 14 | 1799667133155589009 |
[0,1,1,521,9299,350368,8398593,222485869, 5541334459,140076298669,3556982106479, 91815282711883,2417687110590928,65153661912489687, 1799667133155589009] |