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 | 10 |
| 3 | 32 |
| 4 | 82 |
| 5 | 188 |
| 6 | 406 |
| 7 | 848 |
| 8 | 1738 |
| 9 | 3524 |
| 10 | 7102 |
| 11 | 14264 |
| 12 | 28594 |
| 13 | 57260 |
| 14 | 114598 |
| 15 | 229280 |
| 16 | 458650 |
| 17 | 917396 |
| 18 | 1834894 |
| 19 | 3669896 |
| 20 | 7339906 |
| 21 | 14679932 |
| 22 | 29359990 |
| 23 | 58720112 |
| 24 | 117440362 |
| 25 | 234880868 |
| 26 | 469761886 |
| 27 | 939523928 |
| 28 | 1879048018 |
| 29 | 3758096204 |