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| n | a(n) |
|---|---|
| 1 | 84 |
| 2 | 270 |
| 3 | 1488 |
| 4 | 1638 |
| 5 | 24384 |
| 6 | 35640 |
| 7 | 199584 |
| 8 | 2142720 |
| 9 | 12999168 |
| 10 | 100651008 |
| 11 | 208565280 |
| 12 | 240589440 |
| 13 | 470564640 |
| 14 | 3899750400 |
| 15 | 6039429120 |
| 16 | 25769607168 |
| 17 | 36639203328 |
| 18 | 53798734080 |
| 19 | 231758392320 |
| 20 | 314039721600 |
| 21 | 412316073984 |
| 22 | 5566503720960 |
| 23 | 5967138078720 |
| 24 | 302512616524800 |
[84,270,1488,1638,24384,35640,199584,2142720, 12999168,100651008,208565280,240589440,470564640, 3899750400,6039429120,25769607168,36639203328, 53798734080,231758392320,314039721600, 412316073984,5566503720960,5967138078720, 302512616524800] |