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 | 1 |
| 2 | 2 |
| 3 | 5 |
| 4 | 11 |
| 5 | 23 |
| 6 | 27 |
| 7 | 55 |
| 8 | 111 |
| 9 | 121 |
| 10 | 245 |
| 11 | 247 |
| 12 | 495 |
| 13 | 503 |
| 14 | 1007 |
| 15 | 2015 |
| 16 | 2037 |
| 17 | 4077 |
| 18 | 8157 |
| 19 | 8175 |
| 20 | 8179 |
| 21 | 16363 |
| 22 | 16367 |
| 23 | 32735 |
| 24 | 65471 |
| 25 | 65517 |
| 26 | 65519 |
| 27 | 131039 |
| 28 | 131055 |
| 29 | 262111 |