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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 8 |
| 2 | 99 |
| 3 | 1472 |
| 4 | 24190 |
| 5 | 423352 |
| 6 | 7736687 |
| 7 | 145920704 |
| 8 | 2819185470 |
| 9 | 55507755152 |
| 10 | 1109753064926 |
| 11 | 22468653302880 |
| 12 | 459751107210200 |
| 13 | 9492448334898584 |
| 14 | 197515329553612007 |
| 15 | 4137647867252829568 |
| 16 | 87192542104855434550 |
| 17 | 1847067274105955889520 |
[1,8,99,1472,24190,423352,7736687,145920704, 2819185470,55507755152,1109753064926, 22468653302880,459751107210200,9492448334898584, 197515329553612007,4137647867252829568, 87192542104855434550,1847067274105955889520] |