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 | 2 |
| 3 | 9 |
| 4 | 40 |
| 5 | 238 |
| 6 | 1564 |
| 7 | 11807 |
| 8 | 98529 |
| 9 | 904318 |
| 10 | 9006364 |
| 11 | 96709332 |
| 12 | 1110858977 |
| 13 | 13581942434 |
| 14 | 175844515544 |