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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 48 |
| 3 | 576 |
| 4 | 2880 |
| 5 | 9600 |
| 6 | 25200 |
| 7 | 56448 |
| 8 | 112896 |
| 9 | 207360 |
| 10 | 356400 |
| 11 | 580800 |
| 12 | 906048 |
| 13 | 1362816 |
| 14 | 1987440 |
| 15 | 2822400 |
| 16 | 3916800 |
| 17 | 5326848 |
| 18 | 7116336 |
| 19 | 9357120 |
| 20 | 12129600 |
| 21 | 15523200 |
| 22 | 19636848 |
| 23 | 24579456 |
| 24 | 30470400 |
| 25 | 37440000 |
| 26 | 45630000 |
| 27 | 55194048 |
| 28 | 66298176 |
| 29 | 79121280 |
| 30 | 93855600 |
[0,48,576,2880,9600,25200,56448,112896,207360, 356400,580800,906048,1362816,1987440,2822400, 3916800,5326848,7116336,9357120,12129600,15523200, 19636848,24579456,30470400,37440000,45630000, 55194048,66298176,79121280,93855600] |