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 | 0 |
| 2 | 1 |
| 3 | 3 |
| 4 | 5 |
| 5 | 8 |
| 6 | 19 |
| 7 | 22 |
| 8 | 51 |
| 9 | 89 |
| 10 | 145 |
| 11 | 263 |
| 12 | 453 |
| 13 | 851 |
| 14 | 1575 |
| 15 | 2880 |
| 16 | 5469 |
| 17 | 10338 |
| 18 | 19115 |
| 19 | 35782 |
| 20 | 67569 |
| 21 | 128601 |
| 22 | 243600 |
| 23 | 463840 |
| 24 | 883589 |