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| n | a(n) |
|---|---|
| 1 | 1719620 |
| 2 | 20611600 |
| 3 | 190904784 |
| 4 | 2462144400 |
| 5 | 38404362240 |
| 6 | 560006768896 |
| 7 | 7744856653728 |
| 8 | 111070015128576 |
| 9 | 1628167615958016 |
| 10 | 23324716086770596 |
| 11 | 329336531244891208 |
| 12 | 4700007297889800484 |
| 13 | 67568560725185179824 |
[1719620,20611600,190904784,2462144400, 38404362240,560006768896,7744856653728, 111070015128576,1628167615958016, 23324716086770596,329336531244891208, 4700007297889800484,67568560725185179824] |