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 | 12 |
| 2 | 21 |
| 3 | 36 |
| 4 | 51 |
| 5 | 63 |
| 6 | 84 |
| 7 | 96 |
| 8 | 117 |
| 9 | 138 |
| 10 | 165 |
| 11 | 177 |
| 12 | 204 |
| 13 | 216 |
| 14 | 240 |
| 15 | 273 |
| 16 | 306 |
| 17 | 318 |
| 18 | 351 |
| 19 | 363 |