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 | 89 |
| 2 | 5051 |
| 3 | 5657 |
| 4 | 6263 |
| 5 | 6869 |
| 6 | 8081 |
| 7 | 9091 |
| 8 | 9293 |
| 9 | 120121 |
| 10 | 186187 |
| 11 | 188189 |
| 12 | 200201 |
| 13 | 216217 |
| 14 | 242243 |
| 15 | 246247 |
| 16 | 252253 |
| 17 | 278279 |
| 18 | 300301 |
| 19 | 308309 |
| 20 | 318319 |
| 21 | 338339 |
| 22 | 342343 |
| 23 | 350351 |
| 24 | 362363 |
| 25 | 368369 |
| 26 | 390391 |
| 27 | 402403 |
| 28 | 410411 |
| 29 | 416417 |
| 30 | 426427 |
| 31 | 428429 |
| 32 | 440441 |
| 33 | 446447 |
| 34 | 450451 |
| 35 | 452453 |
| 36 | 470471 |
| 37 | 476477 |
| 38 | 482483 |