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| n | a(n) |
|---|---|
| 1 | 24 |
| 2 | 576 |
| 3 | 13824 |
| 4 | 295962 |
| 5 | 6042732 |
| 6 | 117582228 |
| 7 | 2205234900 |
| 8 | 40088968398 |
| 9 | 709841497188 |
| 10 | 12287419441812 |
| 11 | 208546228493724 |
| 12 | 3478737714576768 |
| 13 | 57143989099923852 |
| 14 | 925889151644801202 |
| 15 | 14817867358400405148 |
[24,576,13824,295962,6042732,117582228,2205234900, 40088968398,709841497188,12287419441812, 208546228493724,3478737714576768, 57143989099923852,925889151644801202, 14817867358400405148] |