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 | 3 |
| 2 | 13 |
| 3 | 139 |
| 4 | 233 |
| 5 | 8059 |
| 6 | 9323 |
| 7 | 19763 |
| 8 | 42979 |
| 9 | 103963 |
| 10 | 125149 |
| 11 | 175783 |
| 12 | 185363 |
| 13 | 216179 |
| 14 | 373463 |
| 15 | 422099 |
| 16 | 456763 |
| 17 | 636313 |
| 18 | 729269 |
| 19 | 778963 |
| 20 | 885023 |
| 21 | 1061513 |
| 22 | 1331329 |
| 23 | 1367963 |
| 24 | 1561243 |
| 25 | 2000753 |
| 26 | 2744419 |
| 27 | 3724339 |
| 28 | 4657963 |
| 29 | 6435413 |
| 30 | 6968443 |