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) |
|---|---|
| 3 | 2 |
| 4 | 4 |
| 5 | 10 |
| 6 | 24 |
| 7 | 31 |
| 8 | 42 |
| 9 | 60 |
| 10 | 74 |
| 11 | 94 |
| 12 | 117 |
| 13 | 148 |
| 14 | 173 |
| 15 | 213 |
| 16 | 236 |
| 17 | 275 |
| 18 | 316 |
| 19 | 364 |
| 20 | 409 |
| 21 | 436 |