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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 8 |
| 3 | 104 |
| 4 | 560 |
| 5 | 5368 |
| 6 | 12376 |
| 7 | 47328 |
| 8 | 82536 |
| 9 | 214544 |
| 10 | 683704 |
| 11 | 954304 |
| 12 | 2311464 |
| 13 | 3861872 |
| 14 | 4900280 |
| 15 | 7644832 |
| 16 | 13939848 |
| 17 | 23830808 |
| 18 | 28153208 |
| 19 | 45004168 |
| 20 | 60140976 |
| 21 | 69102384 |
| 22 | 102568544 |
| 23 | 131301352 |
| 24 | 186135312 |
| 25 | 286244672 |
| 26 | 350336680 |
| 27 | 386424688 |
| 28 | 467517240 |
| 29 | 512874648 |
[1,8,104,560,5368,12376,47328,82536,214544,683704, 954304,2311464,3861872,4900280,7644832,13939848, 23830808,28153208,45004168,60140976,69102384, 102568544,131301352,186135312,286244672,350336680, 386424688,467517240,512874648] |