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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 8388607 |
| 3 | 47063200806 |
| 4 | 11681056634501 |
| 5 | 485000783495250 |
| 6 | 6090236036084530 |
| 7 | 31677463851804540 |
| 8 | 82318282158320505 |
| 9 | 120622574326072500 |
| 10 | 108254081784931500 |
| 11 | 63100165695775560 |
| 12 | 24930204590758260 |
[1,8388607,47063200806,11681056634501, 485000783495250,6090236036084530, 31677463851804540,82318282158320505, 120622574326072500,108254081784931500, 63100165695775560,24930204590758260] |