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| n | a(n) |
|---|---|
| 1 | 13 |
| 2 | 275 |
| 3 | 3750 |
| 4 | 85087 |
| 5 | 1711736 |
| 6 | 32070816 |
| 7 | 638181656 |
| 8 | 12585831905 |
| 9 | 246443960437 |
| 10 | 4851375382650 |
| 11 | 95481614034558 |
| 12 | 1877187670574508 |
| 13 | 36916252065609179 |
| 14 | 726088509349589766 |
| 15 | 14280238700708392851 |
| 16 | 280852355095712813555 |
[13,275,3750,85087,1711736,32070816,638181656, 12585831905,246443960437,4851375382650, 95481614034558,1877187670574508,36916252065609179, 726088509349589766,14280238700708392851, 280852355095712813555] |