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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 6 |
| 3 | 78 |
| 4 | 6588 |
| 5 | 1332288 |
| 6 | 1335398688 |
| 7 | 2230748717184 |
| 8 | 13819713971871744 |
| 9 | 219439188546028498944 |
| 10 | 16360198814356838801178624 |
| 11 | 3333281205541847127897252298752 |
| 12 | 2704161270841324410691567986117967872 |
[1,6,78,6588,1332288,1335398688,2230748717184, 13819713971871744,219439188546028498944, 16360198814356838801178624, 3333281205541847127897252298752, 2704161270841324410691567986117967872] |