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| n | a(n) |
|---|---|
| 1 | 56 |
| 2 | 792 |
| 3 | 8118264 |
| 4 | 92669720 |
| 5 | 150198136 |
| 6 | 1188908248 |
| 7 | 1844349560 |
| 8 | 3163127352 |
| 9 | 4351078600 |
| 10 | 5371315400 |
| 11 | 7346629512 |
| 12 | 11097645016 |
| 13 | 16670689208 |
| 14 | 18440293320 |
| 15 | 684957390936 |
| 16 | 6622987708040 |
| 17 | 51820051838712 |
| 18 | 77195892663512 |
| 19 | 133978259344888 |
| 20 | 197726516681672 |
[56,792,8118264,92669720,150198136,1188908248, 1844349560,3163127352,4351078600,5371315400, 7346629512,11097645016,16670689208,18440293320, 684957390936,6622987708040,51820051838712, 77195892663512,133978259344888,197726516681672] |