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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 10 |
| 3 | 140 |
| 4 | 2100 |
| 5 | 60060 |
| 6 | 1051050 |
| 7 | 42882840 |
| 8 | 814773960 |
| 9 | 41227562376 |
| 10 | 824551247520 |
| 11 | 48236247979920 |
| 12 | 999179422441200 |
| 13 | 64899082486180800 |
| 14 | 1379105502831342000 |
| 15 | 96951116849043342600 |
| 16 | 2100607531729272423000 |
| 17 | 157112712418611824074200 |
[1,10,140,2100,60060,1051050,42882840,814773960, 41227562376,824551247520,48236247979920, 999179422441200,64899082486180800, 1379105502831342000,96951116849043342600, 2100607531729272423000,157112712418611824074200] |