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| n | a(n) |
|---|---|
| 1 | 1408 |
| 2 | 8768 |
| 3 | 53728 |
| 4 | 322128 |
| 5 | 2092928 |
| 6 | 13520976 |
| 7 | 86157696 |
| 8 | 548059536 |
| 9 | 3471855360 |
| 10 | 21859425872 |
| 11 | 139526151616 |
| 12 | 888660941136 |
| 13 | 5639390386304 |
| 14 | 35875799655952 |
| 15 | 227944117135296 |
| 16 | 1445770705741904 |
| 17 | 9197000455294016 |
| 18 | 58463779006676944 |
[1408,8768,53728,322128,2092928,13520976,86157696, 548059536,3471855360,21859425872,139526151616, 888660941136,5639390386304,35875799655952, 227944117135296,1445770705741904,9197000455294016, 58463779006676944] |