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 | 1 |
| 2 | 4 |
| 3 | 12 |
| 4 | 4 |
| 5 | 22 |
| 6 | 12 |
| 7 | 114 |
| 8 | 4 |
| 9 | 138 |
| 10 | 142 |
| 11 | 2956 |
| 12 | 6388 |
| 13 | 5248 |
| 14 | 17532 |
| 15 | 96930 |
| 16 | 83782 |
| 17 | 1464 |
| 18 | 897448 |
| 19 | 300832 |
| 20 | 26908 |