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 | 4 |
| 3 | 12 |
| 4 | 28 |
| 5 | 38 |
| 6 | 42 |
| 7 | 74 |
| 8 | 78 |
| 9 | 117 |
| 10 | 155 |
| 11 | 321 |
| 12 | 341 |
| 13 | 400 |
| 14 | 428 |
| 15 | 873 |
| 16 | 1478 |
| 17 | 6381 |
| 18 | 26952 |