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 | 1 |
| 3 | 5 |
| 4 | 11 |
| 5 | 33 |
| 6 | 57 |
| 7 | 157 |
| 8 | 303 |
| 9 | 683 |
| 10 | 1358 |
| 11 | 2974 |
| 12 | 5932 |
| 13 | 12560 |
| 14 | 25328 |
| 15 | 52400 |
| 16 | 106256 |
| 17 | 217875 |
| 18 | 441278 |
| 19 | 899955 |
| 20 | 1822703 |
| 21 | 3701401 |
| 22 | 7491173 |
| 23 | 15178253 |
| 24 | 30691135 |
| 25 | 62085846 |
| 26 | 125435689 |
| 27 | 253414326 |
| 28 | 511547323 |
| 29 | 1032427635 |
| 30 | 2082551931 |
| 31 | 4199956099 |
| 32 | 8466869525 |
| 33 | 17064777665 |