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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 192 |
| 3 | 25344 |
| 4 | 177120 |
| 5 | 568248 |
| 6 | 1298016 |
| 7 | 2466510 |
| 8 | 4175136 |
| 9 | 6525450 |
| 10 | 9619008 |
| 11 | 13557366 |
| 12 | 18442080 |
| 13 | 24374706 |
| 14 | 31456800 |
| 15 | 39789918 |
| 16 | 49475616 |
| 17 | 60615450 |
| 18 | 73310976 |
| 19 | 87663750 |
| 20 | 103775328 |
| 21 | 121747266 |
| 22 | 141681120 |
| 23 | 163678446 |
| 24 | 187840800 |
| 25 | 214269738 |
[0,192,25344,177120,568248,1298016,2466510, 4175136,6525450,9619008,13557366,18442080, 24374706,31456800,39789918,49475616,60615450, 73310976,87663750,103775328,121747266,141681120, 163678446,187840800,214269738] |