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 | 288 |
| 2 | 54 |
| 3 | 90 |
| 4 | 324 |
| 5 | 252 |
| 6 | 0 |
| 7 | 126 |
| 8 | 162 |
| 9 | 216 |
| 10 | 18 |
| 11 | 180 |
| 12 | 234 |
| 13 | 342 |
| 14 | 198 |
| 15 | 36 |
| 16 | 144 |
| 17 | 72 |
| 18 | 306 |
| 19 | 108 |
| 20 | 270 |