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 | 313133 |
| 2 | 323233 |
| 3 | 328283 |
| 4 | 329293 |
| 5 | 338383 |
| 6 | 343433 |
| 7 | 349493 |
| 8 | 350503 |
| 9 | 352523 |
| 10 | 356563 |
| 11 | 364643 |
| 12 | 367673 |
| 13 | 380803 |
| 14 | 383833 |
| 15 | 392923 |
| 16 | 394943 |
| 17 | 395953 |
| 18 | 397973 |
| 19 | 3100010003 |
| 20 | 3100310033 |
| 21 | 3102410243 |
| 22 | 3102510253 |
| 23 | 3102810283 |
| 24 | 3103910393 |
| 25 | 3104610463 |