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| n | a(n) |
|---|---|
| 3 | 1 |
| 4 | 259 |
| 5 | 57535 |
| 6 | 12485095 |
| 7 | 2698853335 |
| 8 | 583026951031 |
| 9 | 125936508182839 |
| 10 | 27202382491194295 |
| 11 | 5875718100153221815 |
| 12 | 1269155234987097152695 |
| 13 | 274137535269957102205111 |
| 14 | 59213707780769522731688119 |
| 15 | 12790160886494733304250601655 |
[1,259,57535,12485095,2698853335,583026951031, 125936508182839,27202382491194295, 5875718100153221815,1269155234987097152695, 274137535269957102205111, 59213707780769522731688119, 12790160886494733304250601655] |