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 | 2 |
| 3 | 3 |
| 4 | 5 |
| 5 | 8 |
| 6 | 11 |
| 7 | 71 |
| 8 | 117 |
| 9 | 123 |
| 10 | 189 |
| 11 | 243 |
| 12 | 303 |
| 13 | 356 |
| 14 | 1421 |
| 15 | 2690 |
| 16 | 5537 |
| 17 | 7580 |
| 18 | 21905 |
| 19 | 32175 |
| 20 | 44357 |