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 | 2 |
| 2 | 3 |
| 3 | 6 |
| 4 | 30 |
| 5 | 40 |
| 6 | 86 |
| 7 | 128 |
| 8 | 264 |
| 9 | 639 |
| 10 | 912 |
| 11 | 1932 |
| 12 | 4650 |
| 13 | 5038 |
| 14 | 7410 |
| 15 | 19041 |