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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 3 |
| 3 | 55 |
| 4 | 10147 |
| 5 | 22069251 |
| 6 | 596500235301 |
| 7 | 206239836523724193 |
| 8 | 936518400276375286684035 |
| 9 | 57040154877904164444585301792867 |
| 10 | 47374533605081761722921471083862749119153 |
[1,3,55,10147,22069251,596500235301, 206239836523724193,936518400276375286684035, 57040154877904164444585301792867, 47374533605081761722921471083862749119153] |