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 | 2 |
| 2 | 3 |
| 3 | 4 |
| 4 | 8 |
| 5 | 20 |
| 6 | 38 |
| 7 | 95 |
| 8 | 248 |
| 9 | 263 |
| 10 | 303 |
| 11 | 304 |
| 12 | 410 |
| 13 | 438 |
| 14 | 548 |
| 15 | 688 |
| 16 | 1074 |
| 17 | 1575 |
| 18 | 8364 |
| 19 | 9910 |
| 20 | 15910 |
| 21 | 37344 |