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 | 5 |
| 2 | 7 |
| 3 | 13 |
| 4 | 29 |
| 5 | 389 |
| 6 | 2053 |
| 7 | 49157 |
| 8 | 106501 |
| 9 | 402653189 |
| 10 | 1744830469 |
| 11 | 2473901162501 |
| 12 | 184717953466373 |
| 13 | 774056185954309 |
| 14 | 31057439705591620336669228531717 |
| 15 | 70745044697537026438728012485623813 |