This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
| 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 |