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 | 5 |
| 2 | 11 |
| 3 | 17 |
| 4 | 37 |
| 5 | 53 |
| 6 | 89 |
| 7 | 107 |
| 8 | 127 |
| 9 | 179 |
| 10 | 197 |
| 11 | 223 |
| 12 | 233 |
| 13 | 257 |
| 14 | 263 |
| 15 | 401 |
| 16 | 409 |
| 17 | 421 |
| 18 | 449 |
| 19 | 457 |
| 20 | 661 |