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 | 1 |
| 3 | 2 |
| 4 | 5 |
| 5 | 14 |
| 6 | 39 |
| 7 | 120 |
| 8 | 358 |
| 9 | 1176 |
| 10 | 3527 |
| 11 | 11622 |
| 12 | 36627 |
| 13 | 121622 |
| 14 | 389560 |
| 15 | 1301140 |
| 16 | 4215748 |