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 | 1 |
| 2 | 3 |
| 3 | 7 |
| 4 | 22 |
| 5 | 70 |
| 6 | 249 |
| 7 | 880 |
| 8 | 3238 |
| 9 | 12180 |
| 10 | 46247 |
| 11 | 174458 |
| 12 | 672920 |
| 13 | 2585414 |
| 14 | 10015955 |