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| n | a(n) |
|---|---|
| 1 | 84 |
| 2 | 432 |
| 3 | 4620 |
| 4 | 56440 |
| 5 | 683144 |
| 6 | 8655424 |
| 7 | 111406336 |
| 8 | 1456853916 |
| 9 | 19269747584 |
| 10 | 256327259704 |
| 11 | 3425977826592 |
| 12 | 45971056435280 |
| 13 | 618874800769152 |
| 14 | 8355263758869800 |
| 15 | 113080150945285296 |
| 16 | 1533719330087763556 |
[84,432,4620,56440,683144,8655424,111406336, 1456853916,19269747584,256327259704,3425977826592, 45971056435280,618874800769152,8355263758869800, 113080150945285296,1533719330087763556] |