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 | 4142135623 |
| 2 | 8872420969 |
| 3 | 9698078569 |
| 4 | 7537694807 |
| 5 | 7973799073 |
| 6 | 7846210703 |
| 7 | 2644121497 |
| 8 | 9935831413 |
| 9 | 6592750559 |
| 10 | 7010955997 |
| 11 | 1472851741 |
| 12 | 5251407989 |
| 13 | 2533965463 |
| 14 | 5339654633 |
| 15 | 6152583523 |
| 16 | 1525835239 |
| 17 | 3950547457 |
| 18 | 5750287759 |
| 19 | 5996172983 |
| 20 | 4084988471 |
| 21 | 6668713013 |