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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 15 |
| 2 | 1050 |
| 3 | 52125 |
| 4 | 3277500 |
| 5 | 179801250 |
| 6 | 11966690625 |
| 7 | 738318187500 |
| 8 | 49788716718750 |
| 9 | 3314446448437500 |
| 10 | 227432073022265625 |
| 11 | 15631633385109375000 |
| 12 | 1090877899335878906250 |
| 13 | 76338563689129101562500 |
| 14 | 5384934139819611328125000 |
| 15 | 381204340327212964599609375 |
| 16 | 27111589537137988341064453125 |
[1,15,1050,52125,3277500,179801250,11966690625, 738318187500,49788716718750,3314446448437500, 227432073022265625,15631633385109375000, 1090877899335878906250,76338563689129101562500, 5384934139819611328125000, 381204340327212964599609375, 27111589537137988341064453125] |