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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 7 |
| 3 | 127 |
| 4 | 4315 |
| 5 | 235831 |
| 6 | 18911467 |
| 7 | 2091412807 |
| 8 | 305035062955 |
| 9 | 56729101908151 |
| 10 | 13102338649018027 |
| 11 | 3679320979659518887 |
| 12 | 1234515698986458346795 |
| 13 | 487763952468349266962071 |
| 14 | 224150079034073231822617387 |
| 15 | 118541831524545132821950527367 |
[1,1,7,127,4315,235831,18911467,2091412807, 305035062955,56729101908151,13102338649018027, 3679320979659518887,1234515698986458346795, 487763952468349266962071, 224150079034073231822617387, 118541831524545132821950527367] |