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| n | a(n) |
|---|---|
| 1 | 31 |
| 2 | 187131 |
| 3 | 347529 |
| 4 | 658749 |
| 5 | 2106853 |
| 6 | 3969147 |
| 7 | 4657471 |
| 8 | 4980801 |
| 9 | 6540807 |
| 10 | 10185273 |
| 11 | 20421219 |
| 12 | 25690413 |
| 13 | 42827421 |
| 14 | 44136183 |
| 15 | 51598911 |
| 16 | 73854183 |
| 17 | 202765017 |
| 18 | 299457613 |
| 19 | 307464339 |
| 20 | 308953281 |
| 21 | 314858271 |
| 22 | 504081669 |
| 23 | 516979281 |
| 24 | 600877641 |
| 25 | 613602549 |
[31,187131,347529,658749,2106853,3969147,4657471, 4980801,6540807,10185273,20421219,25690413, 42827421,44136183,51598911,73854183,202765017, 299457613,307464339,308953281,314858271,504081669, 516979281,600877641,613602549] |