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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 1 |
| 2 | 524800 |
| 3 | 1743421725 |
| 4 | 549756338176 |
| 5 | 47683720703125 |
| 6 | 1828079250264576 |
| 7 | 39896133290043625 |
| 8 | 576460752840294400 |
| 9 | 6078832731271856601 |
| 10 | 50000000005000000000 |
| 11 | 336374997479248716901 |
| 12 | 1916879996254696243200 |
[0,1,524800,1743421725,549756338176, 47683720703125,1828079250264576,39896133290043625, 576460752840294400,6078832731271856601, 50000000005000000000,336374997479248716901, 1916879996254696243200] |