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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 65 |
| 3 | 2771 |
| 4 | 10920 |
| 5 | 158804 |
| 6 | 2413091 |
| 7 | 16636354 |
| 8 | 117650080 |
| 9 | 140766297 |
| 10 | 630947067 |
| 11 | 4639526938 |
| 12 | 153896850898 |
[1,65,2771,10920,158804,2413091,16636354, 117650080,140766297,630947067,4639526938, 153896850898] |