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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 0 |
| 3 | 3 |
| 4 | 24 |
| 5 | 210 |
| 6 | 1620 |
| 7 | 9072 |
| 8 | 46656 |
| 9 | 262440 |
| 10 | 1594080 |
| 11 | 9843120 |
| 12 | 60466176 |
| 13 | 367960320 |
| 14 | 2210794560 |
| 15 | 13162730688 |
| 16 | 78328332288 |
| 17 | 468205557120 |
| 18 | 2810089946880 |
| 19 | 16894457846784 |
| 20 | 101559956668416 |
| 21 | 609954817881600 |
| 22 | 3659790885120000 |
| 23 | 21947909832446976 |
| 24 | 131621703842267136 |
[0,0,3,24,210,1620,9072,46656,262440,1594080, 9843120,60466176,367960320,2210794560,13162730688, 78328332288,468205557120,2810089946880, 16894457846784,101559956668416,609954817881600, 3659790885120000,21947909832446976, 131621703842267136] |