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 | 3 |
| 3 | 5 |
| 4 | 7 |
| 5 | 13 |
| 6 | 23 |
| 7 | 43 |
| 8 | 83 |
| 9 | 163 |
| 10 | 317 |
| 11 | 631 |
| 12 | 1259 |
| 13 | 2503 |
| 14 | 5003 |
| 15 | 9973 |
| 16 | 19937 |
| 17 | 39869 |
| 18 | 79699 |
| 19 | 159389 |
| 20 | 318751 |
| 21 | 637499 |
| 22 | 1274989 |
| 23 | 2549951 |
| 24 | 5099893 |
| 25 | 10199767 |
| 26 | 20399531 |
| 27 | 40799041 |
| 28 | 81598067 |
| 29 | 163196129 |
| 30 | 326392249 |
| 31 | 652784471 |
| 32 | 1305568919 |
| 33 | 2611137817 |