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| n | a(n) |
|---|---|
| 1 | 231 |
| 2 | 1724086 |
| 3 | 23850799560 |
| 4 | 182201755171800 |
| 5 | 1431877318884329856 |
| 6 | 13044657178246280571712 |
| 7 | 116927857061958334999652864 |
| 8 | 1034834452512042254405345443200 |
| 9 | 9329147292031736106743104217184000 |
[231,1724086,23850799560,182201755171800, 1431877318884329856,13044657178246280571712, 116927857061958334999652864, 1034834452512042254405345443200, 9329147292031736106743104217184000] |