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 | 49 |
| 2 | 61 |
| 3 | 82 |
| 4 | 124 |
| 5 | 202 |
| 6 | 358 |
| 7 | 658 |
| 8 | 1258 |
| 9 | 2434 |
| 10 | 4786 |
| 11 | 9442 |
| 12 | 18754 |
| 13 | 37282 |
| 14 | 74338 |
| 15 | 148258 |
| 16 | 296098 |
| 17 | 591394 |
| 18 | 1181986 |
| 19 | 2362402 |
| 20 | 4723234 |
| 21 | 9443362 |
| 22 | 18883618 |
| 23 | 37761058 |
| 24 | 75515938 |
| 25 | 151019554 |
| 26 | 302026786 |
| 27 | 604028962 |
| 28 | 1208033314 |
| 29 | 2416017442 |
| 30 | 4831985698 |