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 | 3 |
| 2 | 4 |
| 3 | 7 |
| 4 | 8 |
| 5 | 14 |
| 6 | 20 |
| 7 | 22 |
| 8 | 62 |
| 9 | 139 |
| 10 | 254 |
| 11 | 272 |
| 12 | 430 |
| 13 | 907 |
| 14 | 1906 |
| 15 | 2278 |
| 16 | 2827 |
| 17 | 3598 |
| 18 | 6812 |
| 19 | 15266 |
| 20 | 20915 |
| 21 | 26180 |
| 22 | 26342 |
| 23 | 27022 |
| 24 | 48275 |
| 25 | 65186 |
| 26 | 69247 |
| 27 | 86647 |