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 | 0 |
| 2 | 1 |
| 3 | 3 |
| 4 | 5 |
| 5 | 7 |
| 6 | 9 |
| 7 | 17 |
| 8 | 21 |
| 9 | 27 |
| 10 | 33 |
| 11 | 45 |
| 12 | 51 |
| 13 | 65 |
| 14 | 73 |
| 15 | 99 |
| 16 | 129 |
| 17 | 153 |
| 18 | 165 |
| 19 | 195 |
| 20 | 257 |
| 21 | 273 |
| 22 | 297 |
| 23 | 325 |
| 24 | 367 |
| 25 | 513 |
| 26 | 561 |