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 | 0 |
| 2 | 1 |
| 3 | 3 |
| 4 | 5 |
| 5 | 7 |
| 6 | 9 |
| 7 | 3951 |
| 8 | 4095 |
| 9 | 4097 |
| 10 | 12291 |
| 11 | 20485 |
| 12 | 21845 |
| 13 | 28679 |
| 14 | 30039 |
| 15 | 36873 |
| 16 | 16187247 |
| 17 | 16777215 |
| 18 | 16777217 |
| 19 | 16781313 |
| 20 | 50331651 |
| 21 | 50343939 |
| 22 | 83886085 |
| 23 | 83894277 |
| 24 | 83906565 |
| 25 | 83914757 |
| 26 | 89458005 |
| 27 | 89466197 |
| 28 | 89478485 |
| 29 | 89486677 |
| 30 | 117440519 |
| 31 | 117448711 |
| 32 | 117460999 |