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 | 3 |
| 3 | 14 |
| 4 | 61 |
| 5 | 273 |
| 6 | 1228 |
| 7 | 5631 |
| 8 | 26141 |
| 9 | 123261 |
| 10 | 589251 |
| 11 | 2855815 |
| 12 | 14021038 |
| 13 | 69707192 |