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) |
|---|---|
| 0 | 3003 |
| 1 | 3113 |
| 2 | 3223 |
| 3 | 3333 |
| 4 | 3443 |
| 5 | 3553 |
| 6 | 3663 |
| 7 | 3773 |
| 8 | 3883 |
| 9 | 3993 |
| 10 | 310103 |
| 11 | 311113 |
| 12 | 312123 |
| 13 | 313133 |
| 14 | 314143 |
| 15 | 315153 |
| 16 | 316163 |
| 17 | 317173 |
| 18 | 318183 |
| 19 | 319193 |
| 20 | 320203 |
| 21 | 321213 |
| 22 | 322223 |
| 23 | 323233 |
| 24 | 324243 |
| 25 | 325253 |
| 26 | 326263 |
| 27 | 327273 |
| 28 | 328283 |
| 29 | 329293 |
| 30 | 330303 |
| 31 | 331313 |
| 32 | 332323 |