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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 89 |
| 3 | 683 |
| 4 | 16717 |
| 5 | 221799 |
| 6 | 4005785 |
| 7 | 61643709 |
| 8 | 1029574631 |
| 9 | 16484061769 |
| 10 | 269718819131 |
| 11 | 4364059061933 |
| 12 | 71019435701025 |
| 13 | 1152314664726905 |
| 14 | 18725412666911121 |
| 15 | 304052089851133193 |
| 16 | 4939032362569285343 |
[1,1,89,683,16717,221799,4005785,61643709, 1029574631,16484061769,269718819131,4364059061933, 71019435701025,1152314664726905,18725412666911121, 304052089851133193,4939032362569285343] |