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 | 2 |
| 3 | 5 |
| 4 | 8 |
| 5 | 13 |
| 6 | 20 |
| 7 | 45 |
| 8 | 86 |
| 9 | 184 |
| 10 | 332 |
| 11 | 657 |
| 12 | 1144 |
| 13 | 2279 |
| 14 | 4460 |
| 15 | 9441 |
| 16 | 17834 |
| 17 | 35564 |
| 18 | 64502 |
| 19 | 123022 |
| 20 | 243534 |
| 21 | 511428 |
| 22 | 981356 |
| 23 | 1979789 |
| 24 | 3705156 |
| 25 | 7232134 |
| 26 | 13723662 |
| 27 | 28745041 |
| 28 | 55900110 |
| 29 | 113564645 |