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 | 5 |
| 3 | 17 |
| 4 | 47 |
| 5 | 114 |
| 6 | 254 |
| 7 | 533 |
| 8 | 1071 |
| 9 | 2083 |
| 10 | 3951 |
| 11 | 7348 |
| 12 | 13452 |
| 13 | 24313 |
| 14 | 43481 |
| 15 | 77077 |
| 16 | 135615 |
| 17 | 237094 |
| 18 | 412234 |
| 19 | 713325 |
| 20 | 1229155 |
| 21 | 2110151 |
| 22 | 3610655 |
| 23 | 6159912 |
| 24 | 10481112 |
| 25 | 17790769 |
| 26 | 30132269 |
| 27 | 50933273 |
| 28 | 85936271 |
| 29 | 144750618 |
| 30 | 243438806 |