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 | 13 |
| 2 | 71 |
| 3 | 181 |
| 4 | 251 |
| 5 | 463 |
| 6 | 521 |
| 7 | 7321 |
| 8 | 36473 |
| 9 | 48157 |
| 10 | 87421 |
| 11 | 168527 |
| 12 | 249341 |