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| n | a(n) |
|---|---|
| 1 | 2896 |
| 2 | 11984 |
| 3 | 43680 |
| 4 | 209740 |
| 5 | 884976 |
| 6 | 4616452 |
| 7 | 20512760 |
| 8 | 112743844 |
| 9 | 512846088 |
| 10 | 2929812696 |
| 11 | 13502550424 |
| 12 | 79476854244 |
| 13 | 369248890000 |
| 14 | 2223584184224 |
| 15 | 10383954125888 |
| 16 | 63603016362920 |
| 17 | 297999250816344 |
| 18 | 1847988056907872 |
[2896,11984,43680,209740,884976,4616452,20512760, 112743844,512846088,2929812696,13502550424, 79476854244,369248890000,2223584184224, 10383954125888,63603016362920,297999250816344, 1847988056907872] |