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| n | a(n) |
|---|---|
| 1 | 1451520 |
| 2 | 9170703360 |
| 3 | 4106059776000 |
| 4 | 457002000000000 |
| 5 | 546914437209907200 |
| 6 | 9077005607176765440 |
| 7 | 108051462804999168000 |
| 8 | 7338585441586912128000 |
| 9 | 245593958671812227742720 |
| 10 | 19266960106724096212992000 |
| 11 | 68852034247000426560552960 |
| 12 | 712225595693024258315904000 |
[1451520,9170703360,4106059776000,457002000000000, 546914437209907200,9077005607176765440, 108051462804999168000,7338585441586912128000, 245593958671812227742720, 19266960106724096212992000, 68852034247000426560552960, 712225595693024258315904000] |