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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 3 |
| 2 | 12 |
| 3 | 66 |
| 4 | 513 |
| 5 | 5769 |
| 6 | 95706 |
| 7 | 2379348 |
| 8 | 89759799 |
| 9 | 5188919427 |
| 10 | 463209471288 |
| 11 | 64236626341974 |
| 12 | 13903296824817117 |
| 13 | 4713694025825766861 |
| 14 | 2510421030027019810854 |
| 15 | 2104931848782489253483752 |
| 16 | 2783505220978001187684672531 |
| 17 | 5813031971452642599096778614183 |
[1,3,12,66,513,5769,95706,2379348,89759799, 5188919427,463209471288,64236626341974, 13903296824817117,4713694025825766861, 2510421030027019810854,2104931848782489253483752, 2783505220978001187684672531, 5813031971452642599096778614183] |