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) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 1 |
| 3 | 3 |
| 4 | 3 |
| 5 | 5 |
| 6 | 12 |
| 7 | 36 |
| 8 | 72 |
| 9 | 147 |
| 10 | 294 |
| 11 | 336 |
| 12 | 1068 |
| 13 | 5076 |
| 14 | 5760 |
| 15 | 14742 |
| 16 | 58968 |
| 17 | 135288 |
| 18 | 328176 |