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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 0 |
| 3 | 5120 |
| 4 | 45152 |
| 5 | 161256 |
| 6 | 376248 |
| 7 | 696992 |
| 8 | 1121176 |
| 9 | 1647008 |
| 10 | 2273384 |
| 11 | 3000304 |
| 12 | 3827768 |
| 13 | 4755776 |
| 14 | 5784328 |
| 15 | 6913424 |
| 16 | 8143064 |
| 17 | 9473248 |
| 18 | 10903976 |
| 19 | 12435248 |
[0,0,5120,45152,161256,376248,696992,1121176, 1647008,2273384,3000304,3827768,4755776,5784328, 6913424,8143064,9473248,10903976,12435248] |