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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 2 |
| 3 | 3 |
| 4 | 12 |
| 5 | 39 |
| 6 | 388 |
| 7 | 8102 |
| 8 | 656108 |
| 9 | 199727714 |
| 10 | 224693292768 |
| 11 | 893966897828288 |
| 12 | 12397352268917562436 |
| 13 | 598097093939369977901540 |
| 14 | 100707091308314174859433507948 |
| 15 | 59497535893138933753768955970555554 |
| 16 | 124081719421265185713331815803874814236572 |
| 17 | 919072633264334061873768956083917736204779032768 |
[1,2,3,12,39,388,8102,656108,199727714, 224693292768,893966897828288,12397352268917562436, 598097093939369977901540, 100707091308314174859433507948, 59497535893138933753768955970555554, 124081719421265185713331815803874814236572, 919072633264334061873768956083917736204779032768] |