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| n | a(n) |
|---|---|
| 3 | 54 |
| 4 | 600 |
| 5 | 9610 |
| 6 | 202800 |
| 7 | 5329646 |
| 8 | 167968080 |
| 9 | 6179829138 |
| 10 | 260151206520 |
| 11 | 12337375641382 |
| 12 | 651015233505000 |
| 13 | 37840126019474714 |
| 14 | 2402561511036567776 |
| 15 | 165461166543219825630 |
| 16 | 12285812875257176823072 |
| 17 | 978456001614356104964386 |
| 18 | 83203281212934340605312360 |
| 19 | 7524376956227661294000910358 |
| 20 | 721103578185352149703877262840 |
[54,600,9610,202800,5329646,167968080,6179829138, 260151206520,12337375641382,651015233505000, 37840126019474714,2402561511036567776, 165461166543219825630,12285812875257176823072, 978456001614356104964386, 83203281212934340605312360, 7524376956227661294000910358, 721103578185352149703877262840] |