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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 0 |
| 3 | 1206 |
| 4 | 26584 |
| 5 | 180750 |
| 6 | 568870 |
| 7 | 1314428 |
| 8 | 2456614 |
| 9 | 4062007 |
| 10 | 6094090 |
| 11 | 8589253 |
| 12 | 11504726 |
| 13 | 14853686 |
| 14 | 18625870 |
| 15 | 22821278 |
| 16 | 27439910 |
| 17 | 32481766 |
| 18 | 37946846 |
| 19 | 43835150 |
| 20 | 50146678 |
| 21 | 56881430 |
| 22 | 64039406 |
| 23 | 71620606 |
| 24 | 79625030 |
| 25 | 88052678 |
| 26 | 96903550 |
[0,0,1206,26584,180750,568870,1314428,2456614, 4062007,6094090,8589253,11504726,14853686, 18625870,22821278,27439910,32481766,37946846, 43835150,50146678,56881430,64039406,71620606, 79625030,88052678,96903550] |