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| n | a(n) |
|---|---|
| 1 | 7 |
| 2 | 40 |
| 3 | 868 |
| 4 | 47872 |
| 5 | 9210784 |
| 6 | 4565849088 |
| 7 | 7939011165696 |
| 8 | 35771349106229248 |
| 9 | 568805952799804981248 |
| 10 | 23519412222495212487835648 |
| 11 | 3445579826336104496385828585472 |
| 12 | 1315514651265664243430976739562487808 |
[7,40,868,47872,9210784,4565849088,7939011165696, 35771349106229248,568805952799804981248, 23519412222495212487835648, 3445579826336104496385828585472, 1315514651265664243430976739562487808] |