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| n | a(n) |
|---|---|
| 0 | 2 |
| 1 | 2 |
| 2 | 6 |
| 3 | 42 |
| 4 | 1050 |
| 5 | 127050 |
| 6 | 13086150 |
| 7 | 65967282150 |
| 8 | 2659866783570150 |
| 9 | 13594579130827036650 |
| 10 | 4484729304047661947505150 |
| 11 | 179016047168539016473835519025150 |
| 12 | 85748973198421705721932588223712809265150 |
| 13 | 533960639770963461900374948788827304744234574385150 |
[2,2,6,42,1050,127050,13086150,65967282150, 2659866783570150,13594579130827036650, 4484729304047661947505150, 179016047168539016473835519025150, 85748973198421705721932588223712809265150, 53396063977096346190037494878882730474423457438515\ 0] |