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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 1 |
| 2 | 134217728 |
| 3 | 7625597484987 |
| 4 | 18014398509481984 |
| 5 | 7450580596923828125 |
| 6 | 1023490369077469249536 |
| 7 | 65712362363534280139543 |
| 8 | 2417851639229258349412352 |
| 9 | 58149737003040059690390169 |
[0,1,134217728,7625597484987,18014398509481984, 7450580596923828125,1023490369077469249536, 65712362363534280139543,2417851639229258349412352, 58149737003040059690390169] |