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| n | a(n) |
|---|---|
| 1 | 8 |
| 2 | 128 |
| 3 | 1808 |
| 4 | 25808 |
| 5 | 369040 |
| 6 | 5276816 |
| 7 | 75450768 |
| 8 | 1078839952 |
| 9 | 15425887120 |
| 10 | 220568403088 |
| 11 | 3153816694160 |
| 12 | 45095125134992 |
| 13 | 644796609413008 |
| 14 | 9219680980164752 |
| 15 | 131828418659815824 |
| 16 | 1884960228421653136 |
[8,128,1808,25808,369040,5276816,75450768, 1078839952,15425887120,220568403088,3153816694160, 45095125134992,644796609413008,9219680980164752, 131828418659815824,1884960228421653136] |