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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 8 |
| 2 | 92 |
| 3 | 1080 |
| 4 | 12070 |
| 5 | 132408 |
| 6 | 1425372 |
| 7 | 15114504 |
| 8 | 158210353 |
| 9 | 1637612160 |
| 10 | 16784647360 |
| 11 | 170537275776 |
| 12 | 1719204122528 |
| 13 | 17209440777600 |
| 14 | 171165585295552 |
| 15 | 1692447401221248 |
| 16 | 16644429470981928 |
| 17 | 162875924564677824 |
| 18 | 1586486181338263456 |
| 19 | 15386713233832145728 |
[1,8,92,1080,12070,132408,1425372,15114504, 158210353,1637612160,16784647360,170537275776, 1719204122528,17209440777600,171165585295552, 1692447401221248,16644429470981928, 162875924564677824,1586486181338263456, 15386713233832145728] |