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 | 4 |
| 5 | 11 |
| 6 | 53 |
| 7 | 307 |
| 8 | 2177 |
| 9 | 19503 |
| 10 | 219489 |
| 11 | 3041937 |
| 12 | 50727755 |
| 13 | 997525229 |
| 14 | 22742733167 |
| 15 | 592821131015 |
| 16 | 17461204518199 |