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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 1 |
| 3 | 1 |
| 4 | 1 |
| 5 | 5 |
| 6 | 33 |
| 7 | 1281 |
| 8 | 1853441 |
| 9 | 3826997739521 |
| 10 | 2989151785658720873470945 |
| 11 | 271581474754155314350055167823358355425497243141 |
| 12 | 57581776430597685625970981157448022010386123824977761496513036956000541901241585948341716033 |
[1,1,1,1,1,5,33,1281,1853441,3826997739521, 2989151785658720873470945, 271581474754155314350055167823358355425497243141, 57581776430597685625970981157448022010386123824977\ 761496513036956000541901241585948341716033] |