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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 31 |
| 3 | 1361 |
| 4 | 334576 |
| 5 | 207009649 |
| 6 | 268530771271 |
| 7 | 644969015852641 |
| 8 | 2642258726261312896 |
| 9 | 17337468317813249073281 |
| 10 | 173383832437017181584973783 |
| 11 | 2538593496477071922439308897841 |
| 12 | 52641334467700181691498204296713016 |
| 13 | 1503509056221581488501100896035227575441 |
[1,31,1361,334576,207009649,268530771271, 644969015852641,2642258726261312896, 17337468317813249073281, 173383832437017181584973783, 2538593496477071922439308897841, 52641334467700181691498204296713016, 1503509056221581488501100896035227575441] |