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| n | a(n) |
|---|---|
| 1 | 677 |
| 2 | 6635777 |
| 3 | 28132417 |
| 4 | 156400037 |
| 5 | 234518597 |
| 6 | 381655297 |
| 7 | 386751557 |
| 8 | 403849217 |
| 9 | 820020497 |
| 10 | 1215498497 |
| 11 | 1298449157 |
| 12 | 1539463697 |
| 13 | 1580539537 |
| 14 | 1839037457 |
| 15 | 2072616677 |
| 16 | 2774550277 |
| 17 | 2969814017 |
| 18 | 6147500837 |
| 19 | 6194319617 |
| 20 | 6703351877 |
| 21 | 6937890437 |
[677,6635777,28132417,156400037,234518597, 381655297,386751557,403849217,820020497, 1215498497,1298449157,1539463697,1580539537, 1839037457,2072616677,2774550277,2969814017, 6147500837,6194319617,6703351877,6937890437] |