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 | 16 |
| 2 | 256 |
| 3 | 2582 |
| 4 | 17594 |
| 5 | 89630 |
| 6 | 367216 |
| 7 | 1271969 |
| 8 | 3857481 |
| 9 | 10504174 |
| 10 | 26169386 |
| 11 | 60506898 |
| 12 | 131289614 |
| 13 | 269716032 |
| 14 | 528358366 |
| 15 | 992720569 |
| 16 | 1797620937 |
| 17 | 3149899316 |
| 18 | 5359276060 |
| 19 | 8879561670 |
| 20 | 14362835354 |
| 21 | 22729680458 |
| 22 | 35259087700 |
| 23 | 53702216265 |