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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 3 |
| 3 | 31 |
| 4 | 1103 |
| 5 | 171311 |
| 6 | 149089887 |
| 7 | 877704854447 |
| 8 | 40451674467223423 |
| 9 | 16514355739866259408591 |
| 10 | 66586047491662065505372477983 |
| 11 | 2923692867015618804999172694908629103 |
| 12 | 1527767556403309713534536695030930443376591295 |
| 13 | 10306227067090276816548435451550663056418226402352755215 |
[1,3,31,1103,171311,149089887,877704854447, 40451674467223423,16514355739866259408591, 66586047491662065505372477983, 2923692867015618804999172694908629103, 1527767556403309713534536695030930443376591295, 10306227067090276816548435451550663056418226402352\ 755215] |