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| n | a(n) |
|---|---|
| 1 | 256 |
| 2 | 1718 |
| 3 | 11701 |
| 4 | 81402 |
| 5 | 563166 |
| 6 | 3880918 |
| 7 | 26804881 |
| 8 | 185489824 |
| 9 | 1282099556 |
| 10 | 8852862392 |
| 11 | 61169759404 |
| 12 | 422870170848 |
| 13 | 2922385929712 |
| 14 | 20190059774152 |
| 15 | 139517455447976 |
| 16 | 964213093638072 |
| 17 | 6663225933024004 |
| 18 | 46041769193957056 |
[256,1718,11701,81402,563166,3880918,26804881, 185489824,1282099556,8852862392,61169759404, 422870170848,2922385929712,20190059774152, 139517455447976,964213093638072,6663225933024004, 46041769193957056] |