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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 58 |
| 3 | 2996 |
| 4 | 165408 |
| 5 | 8817738 |
| 6 | 469476315 |
| 7 | 24968293789 |
| 8 | 1327640457829 |
| 9 | 70590643428412 |
| 10 | 3753257087015148 |
| 11 | 199557480575235203 |
| 12 | 10610292692535605424 |
| 13 | 564139654771938009044 |
| 14 | 29994793111068876818904 |
| 15 | 1594795889617184754313078 |
[0,58,2996,165408,8817738,469476315,24968293789, 1327640457829,70590643428412,3753257087015148, 199557480575235203,10610292692535605424, 564139654771938009044,29994793111068876818904, 1594795889617184754313078] |