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| n | a(n) |
|---|---|
| 6 | 132 |
| 7 | 9009 |
| 8 | 380380 |
| 9 | 12864852 |
| 10 | 383402292 |
| 11 | 10551322782 |
| 12 | 275335499824 |
| 13 | 6924802684800 |
| 14 | 169656773406120 |
| 15 | 4078556074277685 |
| 16 | 96700630711999860 |
| 17 | 2269529269318731420 |
| 18 | 52868514692841609300 |
| 19 | 1224857602490265215010 |
| 20 | 28265620407321158141280 |
| 21 | 650452332645092821924080 |
[132,9009,380380,12864852,383402292,10551322782, 275335499824,6924802684800,169656773406120, 4078556074277685,96700630711999860, 2269529269318731420,52868514692841609300, 1224857602490265215010,28265620407321158141280, 650452332645092821924080] |