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| n | a(n) |
|---|---|
| 0 | 2 |
| 1 | 2 |
| 2 | 10 |
| 3 | 114 |
| 4 | 2154 |
| 5 | 56946 |
| 6 | 1935210 |
| 7 | 80371122 |
| 8 | 3944568042 |
| 9 | 223374129138 |
| 10 | 14335569726570 |
| 11 | 1028242536825906 |
| 12 | 81514988432370666 |
| 13 | 7077578056972377714 |
| 14 | 667946328512863533930 |
| 15 | 68080118128074301929138 |
| 16 | 7453010693997492901047018 |
[2,2,10,114,2154,56946,1935210,80371122, 3944568042,223374129138,14335569726570, 1028242536825906,81514988432370666, 7077578056972377714,667946328512863533930, 68080118128074301929138,7453010693997492901047018] |