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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 5 |
| 3 | 51 |
| 4 | 819 |
| 5 | 18278 |
| 6 | 527085 |
| 7 | 18730855 |
| 8 | 793542167 |
| 9 | 39113958819 |
| 10 | 2201663313200 |
| 11 | 139461523272085 |
| 12 | 9824294829146550 |
| 13 | 762188806010669820 |
| 14 | 64595315110014533629 |
| 15 | 5939055918736259991759 |
| 16 | 588894813538193130767295 |
| 17 | 62651281502108852275337225 |
[1,1,5,51,819,18278,527085,18730855,793542167, 39113958819,2201663313200,139461523272085, 9824294829146550,762188806010669820, 64595315110014533629,5939055918736259991759, 588894813538193130767295, 62651281502108852275337225] |