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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 4 |
| 3 | 160 |
| 4 | 27969 |
| 5 | 2851313628 |
| 6 | 11435583137697149853 |
| 7 | 172076176373548600716226533580715171320 |
| 8 | 152477964010805916216307743912573320915409213041286109881867680915195553313615 |
[2,4,160,27969,2851313628,11435583137697149853, 172076176373548600716226533580715171320, 15247796401080591621630774391257332091540921304128\ 6109881867680915195553313615] |