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 | 13 |
| 5 | 31 |
| 6 | 61 |
| 7 | 139 |
| 8 | 283 |
| 9 | 571 |
| 10 | 1153 |
| 11 | 2311 |
| 12 | 4651 |
| 13 | 9343 |
| 14 | 19141 |
| 15 | 38569 |
| 16 | 77419 |
| 17 | 154873 |
| 18 | 310231 |
| 19 | 621631 |
| 20 | 1243483 |
| 21 | 2486971 |
| 22 | 4974721 |