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) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 5 |
| 3 | 9 |
| 4 | 33 |
| 5 | 73 |
| 6 | 233 |
| 7 | 569 |
| 8 | 1693 |
| 9 | 4353 |
| 10 | 12477 |
| 11 | 32985 |
| 12 | 92637 |
| 13 | 248673 |
| 14 | 690549 |
| 15 | 1869513 |
| 16 | 5158881 |
| 17 | 14033161 |
| 18 | 38587193 |
| 19 | 105246041 |
| 20 | 288818305 |
| 21 | 788939769 |
| 22 | 2162574513 |
| 23 | 5912375033 |
| 24 | 16196093881 |
| 25 | 44300854441 |
| 26 | 121311490937 |