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| n | a(n) |
|---|---|
| 1 | 40 |
| 2 | 208 |
| 3 | 632 |
| 4 | 2344 |
| 5 | 6232 |
| 6 | 20440 |
| 7 | 51800 |
| 8 | 160888 |
| 9 | 401560 |
| 10 | 1215928 |
| 11 | 3032792 |
| 12 | 9077944 |
| 13 | 22776472 |
| 14 | 67860280 |
[40,208,632,2344,6232,20440,51800,160888,401560, 1215928,3032792,9077944,22776472,67860280] |