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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 48 |
| 3 | 768 |
| 4 | 4320 |
| 5 | 15360 |
| 6 | 42000 |
| 7 | 96768 |
| 8 | 197568 |
| 9 | 368640 |
| 10 | 641520 |
| 11 | 1056000 |
| 12 | 1661088 |
| 13 | 2515968 |
| 14 | 3690960 |
| 15 | 5268480 |
| 16 | 7344000 |
| 17 | 10027008 |
| 18 | 13441968 |
| 19 | 17729280 |
| 20 | 23046240 |
| 21 | 29568000 |
| 22 | 37488528 |
| 23 | 47021568 |
| 24 | 58401600 |
| 25 | 71884800 |
| 26 | 87750000 |
| 27 | 106299648 |
| 28 | 127860768 |
| 29 | 152785920 |
| 30 | 181454160 |
[0,48,768,4320,15360,42000,96768,197568,368640, 641520,1056000,1661088,2515968,3690960,5268480, 7344000,10027008,13441968,17729280,23046240, 29568000,37488528,47021568,58401600,71884800, 87750000,106299648,127860768,152785920,181454160] |