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| n | a(n) |
|---|---|
| 1 | 13 |
| 2 | 237 |
| 3 | 356026 |
| 4 | 2932175712336 |
| 5 | 412646680050205587085305856 |
| 6 | 16346619102569481158480824333166611354489546429742186496 |
[13,237,356026,2932175712336, 412646680050205587085305856, 16346619102569481158480824333166611354489546429742\ 186496] |