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 | 1 |
| 2 | 3 |
| 3 | 5 |
| 4 | 9 |
| 5 | 15 |
| 6 | 39 |
| 7 | 45 |
| 8 | 129 |
| 9 | 149 |
| 10 | 243 |
| 11 | 369 |
| 12 | 1365 |
| 13 | 2061 |
| 14 | 5901 |
| 15 | 5951 |
| 16 | 7785 |
| 17 | 10519 |
| 18 | 42519 |
| 19 | 59473 |
| 20 | 213561 |
| 21 | 157559 |
| 22 | 278835 |
| 23 | 503513 |
| 24 | 1553481 |
| 25 | 1051639 |
| 26 | 2491707 |
| 27 | 2981747 |
| 28 | 6622209 |
| 29 | 10056593 |
| 30 | 34139241 |