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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 1 |
| 2 | 6 |
| 3 | 75 |
| 4 | 1476 |
| 5 | 39805 |
| 6 | 1366278 |
| 7 | 56998179 |
| 8 | 2800588808 |
| 9 | 158420939193 |
| 10 | 10140538486410 |
| 11 | 724652822705119 |
| 12 | 57187947315670284 |
| 13 | 4939834587311520117 |
| 14 | 463572330418586227790 |
| 15 | 46965096302630022564315 |
| 16 | 5108915146530700018466832 |
| 17 | 593925863391217441843199089 |
[0,1,6,75,1476,39805,1366278,56998179,2800588808, 158420939193,10140538486410,724652822705119, 57187947315670284,4939834587311520117, 463572330418586227790,46965096302630022564315, 5108915146530700018466832, 593925863391217441843199089] |