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| n | a(n) |
|---|---|
| 1 | 1620 |
| 2 | 1104264 |
| 3 | 474819408 |
| 4 | 174924572760 |
| 5 | 59587625651904 |
| 6 | 19356924219624936 |
| 7 | 6090616046325570480 |
| 8 | 1872977567099580289656 |
| 9 | 566116324214731470647712 |
| 10 | 168820920854627863029497352 |
| 11 | 49802534018235803452666079376 |
[1620,1104264,474819408,174924572760, 59587625651904,19356924219624936, 6090616046325570480,1872977567099580289656, 566116324214731470647712, 168820920854627863029497352, 49802534018235803452666079376] |