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) |
|---|---|
| 0 | 2 |
| 1 | 7 |
| 2 | 29 |
| 3 | 19 |
| 4 | 641 |
| 5 | 41 |
| 6 | 541 |
| 7 | 1597 |
| 8 | 22993 |
| 9 | 397 |
| 10 | 5521 |
| 11 | 303293 |
| 12 | 380881 |
| 13 | 25117 |
| 14 | 210466621 |
| 15 | 508771 |
| 16 | 1573071713 |
| 17 | 108991369171 |
| 18 | 1343341 |
| 19 | 2724783836059 |
| 20 | 39558401 |
| 21 | 2525293 |
| 22 | 4807441 |
| 23 | 215038823 |
| 24 | 1173553 |
| 25 | 61001 |
| 26 | 16463734208221 |
| 27 | 3813697527769 |
| 28 | 58116853330557841 |
| 29 | 327866809 |
| 30 | 99901 |