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 | 8 |
| 2 | 22 |
| 3 | 50 |
| 4 | 106 |
| 5 | 218 |
| 6 | 442 |
| 7 | 890 |
| 8 | 1786 |
| 9 | 3578 |
| 10 | 7162 |
| 11 | 14330 |
| 12 | 28666 |
| 13 | 57338 |
| 14 | 114682 |
| 15 | 229370 |
| 16 | 458746 |
| 17 | 917498 |
| 18 | 1835002 |
| 19 | 3670010 |
| 20 | 7340026 |
| 21 | 14680058 |
| 22 | 29360122 |
| 23 | 58720250 |
| 24 | 117440506 |
| 25 | 234881018 |
| 26 | 469762042 |
| 27 | 939524090 |
| 28 | 1879048186 |