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 | 2 |
| 2 | 3 |
| 3 | 5 |
| 4 | 13 |
| 5 | 32 |
| 6 | 96 |
| 7 | 283 |
| 8 | 907 |
| 9 | 2929 |
| 10 | 9787 |
| 11 | 32939 |
| 12 | 112476 |
| 13 | 386230 |
| 14 | 1336150 |
| 15 | 4642930 |
| 16 | 16208851 |
| 17 | 56786242 |
| 18 | 199614651 |
| 19 | 703678568 |
| 20 | 2487109359 |
| 21 | 8811020024 |
| 22 | 31281360326 |
| 23 | 111272475650 |