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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 14 |
| 3 | 158 |
| 4 | 2274 |
| 5 | 37410 |
| 6 | 670670 |
| 7 | 12786622 |
| 8 | 255519106 |
| 9 | 5302716866 |
| 10 | 113586849614 |
| 11 | 2501007496542 |
| 12 | 56446396937186 |
| 13 | 1303401799574242 |
| 14 | 30756416720161422 |
| 15 | 741216834445478270 |
| 16 | 18240706372460480002 |
| 17 | 458484823574294544770 |
| 18 | 11776969626284389958030 |
[1,2,14,158,2274,37410,670670,12786622,255519106, 5302716866,113586849614,2501007496542, 56446396937186,1303401799574242,30756416720161422, 741216834445478270,18240706372460480002, 458484823574294544770,11776969626284389958030] |