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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 8 |
| 2 | 100 |
| 3 | 1088 |
| 4 | 11008 |
| 5 | 106496 |
| 6 | 999424 |
| 7 | 9175040 |
| 8 | 82837504 |
| 9 | 738197504 |
| 10 | 6509559808 |
| 11 | 56908316672 |
| 12 | 493921239040 |
| 13 | 4260607557632 |
| 14 | 36558761623552 |
| 15 | 312261302288384 |
| 16 | 2656420092706816 |
| 17 | 22517998136852480 |
| 18 | 190277084256403456 |
| 19 | 1603281467343896576 |
| 20 | 13474770085092524032 |
[0,8,100,1088,11008,106496,999424,9175040, 82837504,738197504,6509559808,56908316672, 493921239040,4260607557632,36558761623552, 312261302288384,2656420092706816, 22517998136852480,190277084256403456, 1603281467343896576,13474770085092524032] |