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 | 127 |
| 7 | 255 |
| 8 | 273 |
| 9 | 455 |
| 10 | 6643 |
| 11 | 17057 |
| 12 | 19433 |
| 13 | 19929 |
| 14 | 42405 |
| 15 | 1245161 |
| 16 | 1405397 |
| 17 | 1786971 |
| 18 | 2122113 |
| 19 | 3519339 |
| 20 | 4210945 |
| 21 | 67472641 |
| 22 | 90352181 |
| 23 | 133638015 |
| 24 | 134978817 |
| 25 | 271114881 |
| 26 | 6080408749 |
| 27 | 11022828069 |
| 28 | 24523959661 |
| 29 | 25636651261 |
| 30 | 25726334461 |
| 31 | 28829406059 |
| 32 | 1030890430479 |
| 33 | 1032991588623 |
| 34 | 1085079274815 |
| 35 | 1616662113341 |