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 | 9 |
| 3 | 46 |
| 4 | 124 |
| 5 | 282 |
| 6 | 712 |
| 7 | 1738 |
| 8 | 4124 |
| 9 | 9562 |
| 10 | 21752 |
| 11 | 48730 |
| 12 | 107992 |
| 13 | 237082 |
| 14 | 516376 |
| 15 | 1117210 |