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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 384 |
| 3 | 12288 |
| 4 | 245760 |
| 5 | 3932160 |
| 6 | 55050240 |
| 7 | 704643072 |
| 8 | 8455716864 |
| 9 | 96636764160 |
| 10 | 1063004405760 |
| 11 | 11338713661440 |
| 12 | 117922622078976 |
| 13 | 1200666697531392 |
| 14 | 12006666975313920 |
| 15 | 118219490218475520 |
| 16 | 1148417904979476480 |
| 17 | 11024811887802974208 |
| 18 | 104735712934128254976 |
[0,384,12288,245760,3932160,55050240,704643072, 8455716864,96636764160,1063004405760, 11338713661440,117922622078976,1200666697531392, 12006666975313920,118219490218475520, 1148417904979476480,11024811887802974208, 104735712934128254976] |