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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 70 |
| 3 | 20251 |
| 4 | 19387201 |
| 5 | 47213021620 |
| 6 | 246331792085401 |
| 7 | 2443003220126326201 |
| 8 | 42187963284758541226270 |
| 9 | 1186523552401322210323083451 |
| 10 | 51563739785315001241213870794001 |
| 11 | 3318691262415781291317711866423813020 |
| 12 | 305473715050119138647351857854838738832401 |
[1,1,70,20251,19387201,47213021620, 246331792085401,2443003220126326201, 42187963284758541226270, 1186523552401322210323083451, 51563739785315001241213870794001, 3318691262415781291317711866423813020, 305473715050119138647351857854838738832401] |