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 | 3 |
| 2 | 7 |
| 3 | 19 |
| 4 | 43 |
| 5 | 83 |
| 6 | 167 |
| 7 | 349 |
| 8 | 683 |
| 9 | 1361 |
| 10 | 2699 |
| 11 | 5387 |
| 12 | 10739 |
| 13 | 21467 |
| 14 | 42863 |
| 15 | 85717 |
| 16 | 171103 |
| 17 | 341729 |
| 18 | 682811 |
| 19 | 1364747 |
| 20 | 2728129 |
| 21 | 5454167 |
| 22 | 10906271 |
| 23 | 21808453 |
| 24 | 43611721 |
| 25 | 87215467 |
| 26 | 174419101 |