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 | 0 |
| 2 | 1 |
| 3 | 1 |
| 4 | 13 |
| 5 | 32 |
| 6 | 507 |
| 7 | 1998 |
| 8 | 33136 |
| 9 | 193995 |
| 10 | 3426518 |
| 11 | 27187715 |
| 12 | 501668052 |
| 13 | 5124675822 |