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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 11 |
| 3 | 137 |
| 4 | 363 |
| 5 | 7129 |
| 6 | 83711 |
| 7 | 1145993 |
| 8 | 1195757 |
| 9 | 42142223 |
| 10 | 275295799 |
| 11 | 18858053 |
| 12 | 444316699 |
| 13 | 34052522467 |
| 14 | 312536252003 |
| 15 | 9227046511387 |
| 16 | 290774257297357 |
| 17 | 53676090078349 |
| 18 | 54437269998109 |
| 19 | 2040798836801833 |
| 20 | 2066035355155033 |
| 21 | 85691034670497533 |
[1,11,137,363,7129,83711,1145993,1195757,42142223, 275295799,18858053,444316699,34052522467, 312536252003,9227046511387,290774257297357, 53676090078349,54437269998109,2040798836801833, 2066035355155033,85691034670497533] |