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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 8 |
| 2 | 86 |
| 3 | 1066 |
| 4 | 14361 |
| 5 | 204314 |
| 6 | 3020745 |
| 7 | 45955442 |
| 8 | 714723588 |
| 9 | 11312450432 |
| 10 | 181625888244 |
| 11 | 2950848879096 |
| 12 | 48423670556100 |
| 13 | 801454908292020 |
| 14 | 13363137183238881 |
| 15 | 224253208102065664 |
| 16 | 3784736105491395780 |
| 17 | 64197997357038408976 |
| 18 | 1093863031541592651003 |
[1,8,86,1066,14361,204314,3020745,45955442, 714723588,11312450432,181625888244,2950848879096, 48423670556100,801454908292020,13363137183238881, 224253208102065664,3784736105491395780, 64197997357038408976,1093863031541592651003] |