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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 50575480513 |
| 3 | 1663807730918617976723 |
| 4 | 14304824932873646803553 |
| 5 | 28817336920092499216069 |
| 6 | 20284632396728311969809131 |
| 7 | 168804229342169123733371839 |
| 8 | 909257309497199880752121319 |
[2,50575480513,1663807730918617976723, 14304824932873646803553,28817336920092499216069, 20284632396728311969809131, 168804229342169123733371839, 909257309497199880752121319] |