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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 8 |
| 2 | 109 |
| 3 | 1808 |
| 4 | 33283 |
| 5 | 653696 |
| 6 | 13419460 |
| 7 | 284479136 |
| 8 | 6179728951 |
| 9 | 136842057800 |
| 10 | 3077436307141 |
| 11 | 70095952722752 |
| 12 | 1613743723323028 |
| 13 | 37490308916974496 |
| 14 | 877802418598193488 |
| 15 | 20693109628871653184 |
| 16 | 490732756789852308223 |
| 17 | 11699199238845493854872 |
[1,8,109,1808,33283,653696,13419460,284479136, 6179728951,136842057800,3077436307141, 70095952722752,1613743723323028,37490308916974496, 877802418598193488,20693109628871653184, 490732756789852308223,11699199238845493854872] |