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 | 9 |
| 2 | 11 |
| 3 | 21 |
| 4 | 23 |
| 5 | 45 |
| 6 | 65 |
| 7 | 79 |
| 8 | 153 |
| 9 | 155 |
| 10 | 199 |
| 11 | 361 |
| 12 | 799 |
| 13 | 883 |
| 14 | 1237 |
| 15 | 1253 |
| 16 | 1753 |
| 17 | 4975 |
| 18 | 5117 |
| 19 | 5843 |
| 20 | 8179 |
| 21 | 12831 |