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 | 1 |
| 2 | 2 |
| 3 | 2 |
| 4 | 4 |
| 5 | 4 |
| 6 | 10 |
| 7 | 13 |
| 8 | 29 |
| 9 | 47 |
| 10 | 100 |
| 11 | 181 |
| 12 | 383 |
| 13 | 738 |
| 14 | 1539 |
| 15 | 3087 |
| 16 | 6419 |
| 17 | 13135 |
| 18 | 27402 |
| 19 | 56779 |
| 20 | 118876 |
| 21 | 248384 |
| 22 | 521850 |
| 23 | 1096261 |
| 24 | 2310793 |
| 25 | 4874305 |
| 26 | 10305560 |
| 27 | 21810868 |
| 28 | 46239224 |