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 | 7 |
| 5 | 13 |
| 6 | 20 |
| 7 | 28 |
| 8 | 40 |
| 9 | 52 |
| 10 | 66 |
| 11 | 82 |
| 12 | 99 |
| 13 | 117 |
| 14 | 140 |
| 15 | 164 |
| 16 | 189 |
| 17 | 215 |
| 18 | 243 |
| 19 | 273 |
| 20 | 304 |
| 21 | 336 |
| 22 | 376 |
| 23 | 414 |
| 24 | 454 |