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| n | a(n) |
|---|---|
| 1 | 468968 |
| 2 | 192808 |
| 3 | 145208 |
| 4 | 337896 |
| 5 | 713408 |
| 6 | 1080648 |
| 7 | 3270240 |
| 8 | 7008160 |
| 9 | 10936160 |
| 10 | 33660800 |
| 11 | 72736960 |
| 12 | 113216800 |
| 13 | 339966080 |
| 14 | 729156480 |
| 15 | 1132733728 |
| 16 | 3399739520 |
| 17 | 7291568000 |
| 18 | 11327337280 |
| 19 | 33997395200 |
| 20 | 72915680000 |
| 21 | 113273372800 |
[468968,192808,145208,337896,713408,1080648, 3270240,7008160,10936160,33660800,72736960, 113216800,339966080,729156480,1132733728, 3399739520,7291568000,11327337280,33997395200, 72915680000,113273372800] |