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) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 8 |
| 3 | 35 |
| 4 | 169 |
| 5 | 862 |
| 6 | 4575 |
| 7 | 24999 |
| 8 | 139700 |
| 9 | 794684 |
| 10 | 4586377 |
| 11 | 26788423 |
| 12 | 158054285 |
| 13 | 940603900 |