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 | 12345 |
| 2 | 12354 |
| 3 | 12435 |
| 4 | 12453 |
| 5 | 12534 |
| 6 | 12543 |
| 7 | 13245 |
| 8 | 13254 |
| 9 | 13425 |
| 10 | 13452 |
| 11 | 13524 |
| 12 | 13542 |
| 13 | 14235 |
| 14 | 14253 |
| 15 | 14325 |
| 16 | 14352 |
| 17 | 14523 |
| 18 | 14532 |
| 19 | 15234 |
| 20 | 15243 |
| 21 | 15324 |
| 22 | 15342 |
| 23 | 15423 |
| 24 | 15432 |
| 25 | 21345 |
| 26 | 21354 |
| 27 | 21435 |
| 28 | 21453 |
| 29 | 21534 |
| 30 | 21543 |
| 31 | 23145 |
| 32 | 23154 |
| 33 | 23415 |