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 | 17 |
| 3 | 97 |
| 4 | 257 |
| 5 | 641 |
| 6 | 1297 |
| 7 | 4177 |
| 8 | 4721 |
| 9 | 12401 |
| 10 | 15937 |
| 11 | 16561 |
| 12 | 38561 |
| 13 | 65537 |
| 14 | 83537 |
| 15 | 89041 |
| 16 | 105601 |
| 17 | 140321 |
| 18 | 160081 |
| 19 | 204481 |
| 20 | 283937 |
| 21 | 284881 |
| 22 | 384817 |
| 23 | 391921 |
| 24 | 411361 |
| 25 | 462097 |
| 26 | 471617 |
| 27 | 531457 |
| 28 | 643217 |
| 29 | 824641 |
| 30 | 838561 |
| 31 | 1049201 |
| 32 | 1089841 |
| 33 | 1342897 |