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| n | a(n) |
|---|---|
| 1 | 8 |
| 2 | 320 |
| 3 | 8616 |
| 4 | 207496 |
| 5 | 4788808 |
| 6 | 108326760 |
| 7 | 2423906696 |
| 8 | 53891103656 |
| 9 | 1193490502728 |
| 10 | 26367062410600 |
| 11 | 581618469479176 |
| 12 | 12817206071979816 |
| 13 | 282280911579925448 |
| 14 | 6214413253138283240 |
| 15 | 136776355872474130056 |
| 16 | 3009909527048881143976 |
| 17 | 66229625352973066928968 |
[8,320,8616,207496,4788808,108326760,2423906696, 53891103656,1193490502728,26367062410600, 581618469479176,12817206071979816, 282280911579925448,6214413253138283240, 136776355872474130056,3009909527048881143976, 66229625352973066928968] |