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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 5 |
| 3 | 3 |
| 4 | 251 |
| 5 | 95 |
| 6 | 19087 |
| 7 | 5257 |
| 8 | 1070017 |
| 9 | 25713 |
| 10 | 26842253 |
| 11 | 4777223 |
| 12 | 703604254357 |
| 13 | 106364763817 |
| 14 | 1166309819657 |
| 15 | 25221445 |
| 16 | 8092989203533249 |
| 17 | 85455477715379 |
| 18 | 12600467236042756559 |
| 19 | 1311546499957236437 |
| 20 | 8136836498467582599787 |
[1,1,5,3,251,95,19087,5257,1070017,25713,26842253, 4777223,703604254357,106364763817,1166309819657, 25221445,8092989203533249,85455477715379, 12600467236042756559,1311546499957236437, 8136836498467582599787] |