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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 5 |
| 3 | 61 |
| 4 | 1329 |
| 5 | 43841 |
| 6 | 1987153 |
| 7 | 116322249 |
| 8 | 8430315169 |
| 9 | 733890562273 |
| 10 | 75025552012641 |
| 11 | 8851196086238969 |
| 12 | 1188516164483406289 |
| 13 | 179619377095898214801 |
| 14 | 30271231938826215582001 |
| 15 | 5645050489627807288153321 |
| 16 | 1157185379272549414363693377 |
| 17 | 259281400277115714365664526529 |
[1,1,5,61,1329,43841,1987153,116322249,8430315169, 733890562273,75025552012641,8851196086238969, 1188516164483406289,179619377095898214801, 30271231938826215582001,5645050489627807288153321, 1157185379272549414363693377, 259281400277115714365664526529] |