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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 12 |
| 2 | 126 |
| 3 | 1296 |
| 4 | 13365 |
| 5 | 138996 |
| 6 | 1459458 |
| 7 | 15466464 |
| 8 | 165297834 |
| 9 | 1780130520 |
| 10 | 19301700924 |
| 11 | 210564010080 |
| 12 | 2309623985565 |
| 13 | 25458117777540 |
| 14 | 281857732537050 |
| 15 | 3133071216411840 |
| 16 | 34953325758094590 |
| 17 | 391242268149428520 |
| 18 | 4392583646950402020 |
| 19 | 49454259823789423200 |
[1,12,126,1296,13365,138996,1459458,15466464, 165297834,1780130520,19301700924,210564010080, 2309623985565,25458117777540,281857732537050, 3133071216411840,34953325758094590, 391242268149428520,4392583646950402020, 49454259823789423200] |