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 | 3 |
| 2 | 5 |
| 3 | 7 |
| 4 | 11 |
| 5 | 17 |
| 6 | 43 |
| 7 | 179 |
| 8 | 467 |
| 9 | 8363 |
| 10 | 21893 |
| 11 | 35423 |
| 12 | 92737 |
| 13 | 392837 |
| 14 | 204668311 |
| 15 | 1402817467 |
| 16 | 40730022149 |
| 17 | 8105479075763 |
| 18 | 15080227609492692859 |
| 19 | 100190602496116782278655832523 |
| 20 | 26361745652748197675264382970030251614748343 |