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 | 6 |
| 3 | 16 |
| 4 | 42 |
| 5 | 106 |
| 6 | 268 |
| 7 | 660 |
| 8 | 1618 |
| 9 | 3922 |
| 10 | 9438 |
| 11 | 22540 |
| 12 | 53528 |
| 13 | 126358 |