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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 48 |
| 3 | 20992 |
| 4 | 85327872 |
| 5 | 3249109204992 |
| 6 | 1163614255186968576 |
| 7 | 3928452022261522225954816 |
| 8 | 125206136723337854976992338771968 |
| 9 | 37708401216116613420253652395390480154624 |
[1,48,20992,85327872,3249109204992, 1163614255186968576,3928452022261522225954816, 125206136723337854976992338771968, 37708401216116613420253652395390480154624] |