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 | 3 |
| 1 | 4 |
| 2 | 7 |
| 3 | 11 |
| 4 | 18 |
| 5 | 119 |
| 6 | 137 |
| 7 | 256 |
| 8 | 393 |
| 9 | 649 |
| 10 | 4287 |
| 11 | 4936 |
| 12 | 9223 |
| 13 | 14159 |
| 14 | 23382 |
| 15 | 154451 |
| 16 | 177833 |
| 17 | 332284 |
| 18 | 510117 |
| 19 | 842401 |
| 20 | 5564523 |
| 21 | 6406924 |
| 22 | 11971447 |
| 23 | 18378371 |
| 24 | 30349818 |
| 25 | 200477279 |
| 26 | 230827097 |
| 27 | 431304376 |
| 28 | 662131473 |