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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 8 |
| 2 | 130 |
| 3 | 3344 |
| 4 | 119808 |
| 5 | 5547112 |
| 6 | 316221904 |
| 7 | 21462652080 |
| 8 | 1692342355840 |
| 9 | 152162079949448 |
| 10 | 15373938883590144 |
| 11 | 1725108070356807952 |
| 12 | 212915967853642332160 |
| 13 | 28672289555680558679400 |
| 14 | 4184239024352928346482688 |
| 15 | 657856889310116430352244528 |
| 16 | 110868321594997440513876197376 |
[1,8,130,3344,119808,5547112,316221904, 21462652080,1692342355840,152162079949448, 15373938883590144,1725108070356807952, 212915967853642332160,28672289555680558679400, 4184239024352928346482688, 657856889310116430352244528, 110868321594997440513876197376] |