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) |
|---|---|
| 1 | 2 |
| 2 | 5 |
| 3 | 13 |
| 4 | 33 |
| 5 | 83 |
| 6 | 205 |
| 7 | 495 |
| 8 | 1169 |
| 9 | 2707 |
| 10 | 6169 |
| 11 | 13889 |
| 12 | 30993 |
| 13 | 68701 |
| 14 | 151469 |
| 15 | 332349 |
| 16 | 725837 |
| 17 | 1577751 |
| 18 | 3413221 |
| 19 | 7349029 |
| 20 | 15751187 |
| 21 | 33616925 |
| 22 | 71475193 |
| 23 | 151466705 |
| 24 | 320072415 |
| 25 | 674721797 |
| 26 | 1419327223 |
| 27 | 2979993519 |
| 28 | 6245693407 |
| 29 | 13068049163 |