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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 80 |
| 3 | 65600 |
| 4 | 552093440 |
| 5 | 47694893373440 |
| 6 | 42294602754348892160 |
| 7 | 384991688574716612134952960 |
| 8 | 35972520655083241381477879725916160 |
| 9 | 34501934082562716587411029908821592862883840 |
| 10 | 339679276508747763623945195020701159657032777565470720 |
[1,80,65600,552093440,47694893373440, 42294602754348892160,384991688574716612134952960, 35972520655083241381477879725916160, 34501934082562716587411029908821592862883840, 33967927650874776362394519502070115965703277756547\ 0720] |