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 | 3 |
| 4 | 7 |
| 5 | 22 |
| 6 | 81 |
| 7 | 331 |
| 8 | 1436 |
| 9 | 6510 |
| 10 | 30129 |
| 11 | 141512 |
| 12 | 671538 |
| 13 | 3210620 |
| 14 | 15443871 |
| 15 | 74662005 |
| 16 | 362506902 |