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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 10 |
| 2 | 236 |
| 3 | 8472 |
| 4 | 359944 |
| 5 | 16722896 |
| 6 | 822334816 |
| 7 | 42068907200 |
| 8 | 2215884717400 |
| 9 | 119364801362800 |
| 10 | 6545334930678816 |
| 11 | 364137834051739200 |
| 12 | 20502307365808906816 |
| 13 | 1166063313963833813632 |
| 14 | 66893439680369963627264 |
[1,10,236,8472,359944,16722896,822334816, 42068907200,2215884717400,119364801362800, 6545334930678816,364137834051739200, 20502307365808906816,1166063313963833813632, 66893439680369963627264] |