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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 3 |
| 3 | 11 |
| 4 | 17 |
| 5 | 91 |
| 6 | 271 |
| 7 | 1927 |
| 8 | 2137 |
| 9 | 2347 |
| 10 | 4447 |
| 11 | 49127 |
| 12 | 51437 |
| 13 | 670991 |
| 14 | 1091411 |
| 15 | 1541861 |
| 16 | 1571891 |
| 17 | 26752177 |
| 18 | 27262687 |
| 19 | 518501563 |
| 20 | 528201253 |
| 21 | 731894743 |
| 22 | 945287923 |
| 23 | 21751321919 |
| 24 | 21974414789 |
| 25 | 22197507659 |
| 26 | 27997922279 |
| 27 | 28221015149 |
[1,3,11,17,91,271,1927,2137,2347,4447,49127,51437, 670991,1091411,1541861,1571891,26752177,27262687, 518501563,528201253,731894743,945287923, 21751321919,21974414789,22197507659,27997922279, 28221015149] |