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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 128 |
| 3 | 139968 |
| 4 | 536870912 |
| 5 | 5000000000000 |
| 6 | 92442129447518208 |
| 7 | 2988151979474457198592 |
| 8 | 154742504910672534362390528 |
| 9 | 12044329605471552321957641846784 |
| 10 | 1342177280000000000000000000000000000 |
| 11 | 206097683218942123873399068932507659403264 |
| 12 | 42281678783395138381516145098915043145456549888 |
[1,128,139968,536870912,5000000000000, 92442129447518208,2988151979474457198592, 154742504910672534362390528, 12044329605471552321957641846784, 1342177280000000000000000000000000000, 206097683218942123873399068932507659403264, 42281678783395138381516145098915043145456549888] |